This article has multiple issues. Please help improve it or discuss these issues on the talk page. It is written like a personal reflection or essay rather than an encyclopedic description of the subject. Tagged since March 2011. It may contain original research. Tagged since March 2011.

Early wrist watch by Waltham, worn by soldiers in World War I (Deutsches Uhrenmuseum, Inv. 47-3352)

A watch is a small clock, typically worn either on the wrist or attached on a chain and carried in a pocket; wristwatches, however, are the most common type of watch used today. Watches evolved in the 17th century from spring powered clocks, which appeared in the 15th century. The first watches were strictly mechanical. As technology progressed, the mechanisms used to measure time have, in some cases, been replaced by use of quartz vibrations or electromagnetic pulses.^[1] The first digital electronic watch was developed in 1970.^[2]

Before wristwatches became popular in the 1920s, most watches were pocket watches, which often had covers and were carried in a pocket and attached to a watch chain or watch fob.^[3] In the early 1900s, the wristwatch, originally called a Wristlet, was reserved for women and considered more of a passing fad than a serious timepiece. Men, who carried pocket watches, were quoted as saying they would "sooner wear a skirt as wear a wristwatch".^[4] This changed in World War I, when soldiers on the battlefield found pocket watches to be impractical and attached their watches to their wrist by a cupped leather strap. It is also believed that Girard-Perregaux equipped the German Imperial Navy with wristwatches in a similar fashion as early as the 1880s, to be used while synchronizing naval attacks and firing artillery.^[4]

Most inexpensive and medium-priced watches used mainly for timekeeping are electronic watches with quartz movements.^[1] Expensive collectible watches, valued more for their workmanship and aesthetic appeal than for simple timekeeping, often have purely mechanical movements and are powered by springs, even though mechanical movements are less accurate than more affordable quartz movements. In addition to the time, modern watches often display the day, date, month and year, and electronic watches may have many other functions. Watches that provide additional time-related features such as timers, chronographs and alarm functions are not uncommon. Some modern designs even go as far as using GPS^[5] technology or heart-rate monitoring^[6] capabilities.

The study of timekeeping is known as horology.

History[link]

The earliest dated watch known, from 1530

This section requires expansion.

Watches evolved from portable spring driven clocks, which first appeared in 15th century Europe. Watches weren't widely worn in pockets until the 17th century.

Movement[link]

Different kinds of movements move the hands differently as shown in this 2 second exposure. The left watch has a mechanical 1/6 s movement, the right one has a "1 s" quartz movement

A Russian mechanical watch movement

A movement in watchmaking is the mechanism that measures the passage of time and displays the current time (and possibly other information including date, month and day). Movements may be entirely mechanical, entirely electronic (potentially with no moving parts), or a blend of the two. Most watches intended mainly for timekeeping today have electronic movements, with mechanical hands on the watch face indicating the time.

Mechanical movements[link]

Compared to electronic movements, mechanical watches are less accurate, often with errors of seconds per day, and they are sensitive to position, temperature^[7] and magnetism.^[8] They are also costly to produce, require regular maintenance and adjustment, and are more prone to failure. Nevertheless, the craftsmanship of mechanical watches still attracts interest from part of the watch-buying public. Skeleton watches are designed to leave the mechanism visible for aesthetic purposes.

Mechanical movements use an escapement mechanism to control and limit the unwinding and winding parts of a spring, converting what would otherwise be a simple unwinding into a controlled and periodic energy release. Mechanical movements also use a balance wheel together with the balance spring (also known as a hairspring) to control motion of the gear system of the watch in a manner analogous to the pendulum of a pendulum clock. The tourbillon, an optional part for mechanical movements, is a rotating frame for the escapement, which is used to cancel out or reduce the effects of gravitational bias to the timekeeping. Due to the complexity of designing a tourbillon, they are very expensive, and only found in "prestige" watches.

The pin-lever escapement (called the Roskopf movement after its inventor, Georges Frederic Roskopf), which is a cheaper version of the fully levered movement, was manufactured in huge quantities by many Swiss manufacturers as well as Timex, until it was replaced by quartz movements.^[9][10][11]

Tuning-fork watches use a type of electromechanical movement. Introduced by Bulova in 1960, they use a tuning fork with a precise frequency (most often 360 hertz) to drive a mechanical watch. The task of converting electronically pulsed fork vibration into rotary movement is done via two tiny jeweled fingers, called pawls. Tuning-fork watches were rendered obsolete when electronic quartz watches were developed. Quartz watches were cheaper to produce and even more accurate.

Traditional mechanical watch movements use a spiral spring called a mainspring as a power source. In manual watches the spring must be rewound periodically by the user by turning the watch crown. Antique pocketwatches were wound by inserting a separate key into a hole in the back of the watch and turning it. Most modern watches are designed to run 40 hours on a winding and thus must be wound daily, but some run for several days and a few have 192-hour mainsprings and are wound weekly.

Automatic watches[link]

Automatic watch: An eccentric weight, called a rotor, swings with the movement of the wearer's body and winds the spring

A self-winding or automatic watch is one that rewinds the mainspring of a mechanical movement by the natural motions of the wearer's body. The first self-winding mechanism was invented for pocket watches in 1770 by Abraham-Louis Perrelet,^[12] but the first "self-winding", or "automatic", wristwatch was the invention of a British watch repairer named John Harwood in 1923. This type of watch allows for constant winding without special action from the wearer; it works by an eccentric weight, called a winding rotor, which rotates with the movement of the wearer's wrist. The back-and-forth motion of the winding rotor couples to a ratchet to automatically wind the mainspring. Self-winding watches usually can also be wound manually so they can be kept running when not worn or if the wearer's wrist motions are inadequate to keep the watch wound.

Electronic movements[link]

Electronic movements have few or no moving parts, as they use the piezoelectric effect in a tiny quartz crystal to provide a stable time base for a mostly electronic movement. The crystal forms a quartz oscillator which resonates at a specific and highly stable frequency, and which can be used to accurately pace a timekeeping mechanism. For this reason, electronic watches are often called quartz watches. Most quartz movements are primarily electronic but are geared to drive mechanical hands on the face of the watch in order to provide a traditional analog display of the time, which is still preferred by some consumers.

Prototype of a Quartz Wristwatch, CEH Switzerland, 1967

In 1959 Seiko gave an order to Epson (a daughter company of Seiko and the actual brain behind the quartz revolution) to start developing a quartz wristwatch. The project was codenamed 59A and by the 1964 Tokyo Summer Olympics, Seiko had a working prototype of a portable quartz watch which took part in time measurements throughout the event.

The first prototypes of an electronic quartz wristwatch (not just portable quartz watches as the Seiko timekeeping devices at the Tokyo Olympics in 1964) were made by the CEH research laboratory in Neuchâtel, Switzerland. From 1965 through 1967 pioneering development work was done on a miniaturized 8192 Hz quartz oscillator, a thermo-compensation module and an inhouse-made, dedicated integrated circuit (unlike the hybrid circuits used in the later Seiko Astron wristwatch). As a result, the BETA 1 prototype set new timekeeping performance records at the International Chronometric Competition held at the Observatory of Neuchâtel in 1967.^[13]

Quartz Movement of the Seiko Astron, 1969 (Deutsches Uhrenmuseum, Inv. 2010-006)

The first quartz watch to enter production was the Seiko 35 SQ Astron, which hit the shelves on December 25, 1969. One particularly interesting decision made by Seiko at that time was to not patent the whole movement of the quartz wristwatch, thus allowing other manufacturers to benefit from the Seiko technology. This played a major role in the popularity and quick development of the quartz watch, which in less than a decade was dominant in the watch market, nearly ending an almost 100 years of mechanical wristwatch heritage. The modern quartz movements are produced in very large quantities, and even the cheapest wristwatches typically have quartz movements. Whereas mechanical movements can typically be off by several seconds a day, an inexpensive quartz movement in a child's wristwatch may still be accurate to within half a second per day—ten times better than a mechanical movement.^[14]

After a consolidation of the mechanical watch industry in Switzerland during the 1970s, mass production of quartz wristwatches took off under the leadership of the Swatch Group of companies, a Swiss conglomerate with vertical control of the production of Swiss watches and related products. For quartz wristwatches, subsidiaries of Swatch manufactured watch batteries (Renata), oscillators (Oscilloquartz) and integrated circuits (Ebauches Electronic SA). The launch of the new SWATCH brand in 1983, was marked by bold new styling, design and marketing. Today, the Swatch Group is the world's largest watch company.

Seiko's efforts to combine the quartz and mechanical movements bore fruit after 20 years of research, leading to the introduction of the Seiko Spring Drive, first in a limited domestic market production in 1999 and to the world in September 2005. The Spring Drive manages to keep time within quartz standards without the use of a battery, using a traditional mechanical gear train powered by a spring, while at the same time doesn't have the need of a balance wheel either.

Radio time signal watches are a type of electronic quartz watch which synchronizes (time transfer) its time with an external time source such as in atomic clocks, time signals from GPS navigation satellites, the German DCF77 signal in Europe, WWVB in the US, and others. Movements of this type may -among others- synchronize not only the time of day but also the date, the leap-year status of the current year, and the current state of daylight saving time (on or off). However, other than the radio receiver these watches are normal quartz watches in all other aspects.

Electronic watches require electricity as a power source. Some mechanical movements and hybrid electronic-mechanical movements also require electricity. Usually the electricity is provided by a replaceable battery. The first use of electrical power in watches was as a substitute for the mainspring, in order to remove the need for winding. The first electrically powered watch, the Hamilton Electric 500, was released in 1957 by the Hamilton Watch Company of Lancaster, Pennsylvania.

Watch batteries (strictly speaking cells, as a battery is composed of multiple cells) are specially designed for their purpose. They are very small and provide tiny amounts of power continuously for very long periods (several years or more). In most cases, replacing the battery requires a trip to a watch-repair shop or watch dealer; this is especially true for watches that are designed to be water-resistant, as special tools and procedures are required to ensure that the watch remains water-resistant after battery replacement. Silver-oxide and lithium batteries are popular today; mercury batteries, formerly quite common, are no longer used, for environmental reasons. Cheap batteries may be alkaline, of the same size as silver-oxide cells but providing shorter life. Rechargeable batteries are used in some solar powered watches.

Some electronic watches are also powered by the movement of the wearer of the watch. For instance, Seiko's Kinetic powered quartz watches make use of the motion of the wearer's arm turning a rotating weight which causes a tiny generator to supply power to charge a rechargeable battery that runs the watch. The concept is similar to that of self-winding spring movements, except that electrical power is generated instead of mechanical spring tension.

Solar powered watches are powered by light. A photovoltaic cell on the face (dial) of the watch converts light to electricity, which in turn is used to charge a rechargeable battery or capacitor. The movement of the watch draws its power from the rechargeable battery or capacitor. As long as the watch is regularly exposed to fairly strong light (such as sunlight), it never needs battery replacement, and some models need only a few minutes of sunlight to provide weeks of energy (as in the Citizen Eco-Drive). Some of the early solar watches of the 1970s had innovative and unique designs to accommodate the array of solar cells needed to power them (Synchronar, Nepro, Sicura and some models by Cristalonic, Alba, Seiko and Citizen). As the decades progressed and the efficiency of the solar cells increased while the power requirements of the movement and display decreased, solar watches began to be designed to look like other conventional watches.^[15]

A rarely used power source is the temperature difference between the wearer's arm and the surrounding environment (as applied in the Citizen Eco-Drive Thermo).

Display[link]

Analog[link]

Poljot chronograph

Traditionally, watches have displayed the time in analog form, with a numbered dial upon which are mounted at least a rotating hour hand and a longer, rotating minute hand. Many watches also incorporate a third hand that shows the current second of the current minute. Watches powered by quartz usually have a second hand that snaps every second to the next marker. Watches powered by a mechanical movement appears to have a gliding second hand, although it is actually not gliding; the hand merely moves in smaller steps, typically 1/5 of a second, corresponding to the beat (half period) of the balance wheel. In some escapements (for example the duplex escapement), the hand advances every two beats (full period) of the balance wheel, typically 1/2 second in those watches, or even every four beats (two periods, 1 second), in the double duplex escapement. A truly gliding second hand is achieved with the tri-synchro regulator of Spring Drive watches. All of the hands are normally mechanical, physically rotating on the dial, although a few watches have been produced with "hands" that are simulated by a liquid-crystal display.

Analog display of the time is nearly universal in watches sold as jewelry or collectibles, and in these watches, the range of different styles of hands, numbers, and other aspects of the analog dial is very broad. In watches sold for timekeeping, analog display remains very popular, as many people find it easier to read than digital display; but in timekeeping watches the emphasis is on clarity and accurate reading of the time under all conditions (clearly marked digits, easily visible hands, large watch faces, etc.). They are specifically designed for the left wrist with the stem (the knob used for changing the time) on the right side of the watch; this makes it easy to change the time without removing the watch from the wrist. This is the case if one is right-handed and the watch is worn on the left wrist (as is traditionally done). If one is left-handed and wears the watch on the right wrist, one has to remove the watch from the wrist to reset the time or to wind the watch.

Analog watches as well as clocks are often marketed showing a display time of approximately 10:09 or 10:10. This creates a visually pleasing smile-like face on upper half of the watch, in addition to enclosing the manufacturer's name. Digital displays often show a time of 12:08, where the increases in the numbers from left to right culminating in the fully lit numerical display of the 8 also gives a positive feeling.^[16][17]

Analog watch displays can be used to indicate cardinal direction due to the relation between the position of the hour hand and the position of the Sun in the sky. By rotating the watch so that the hour hand points toward the Sun, the point halfway between the hour hand and 12 o'clock will indicate south when observing from a position in the Northern hemisphere. In the Southern hemisphere, the point halfway between the hour hand pointed at the sun and 12 o'clock on the dial indicates North.

Digital[link]

Cortébert digital mechanical pocket watch. 1890s

Cortébert digital mechanical wristwatch. 1920s

A silver Pulsar LED watch from 1976.

A digital display simply shows the time as a number, e.g., 12:08 instead of a short hand pointing towards the number 12 and a long hand 8/60 of the way round the dial. The digits are usually shown as a seven-segment display.

The first digital mechanical pocket watches appeared in late 19th century. In the 1920s the first digital mechanical wristwatches appeared.

The first digital electronic watch, a Pulsar LED prototype in 1970, was developed jointly by Hamilton Watch Company and Electro-Data. John Bergey, the head of Hamilton's Pulsar division, said that he was inspired to make a digital timepiece by the then-futuristic digital clock that Hamilton themselves made for the 1968 science fiction film 2001: A Space Odyssey. On April 4, 1972, the Pulsar was finally ready, made in 18-carat gold and sold for $2,100. It had a red light-emitting diode (LED) display.

Digital LED watches were very expensive and out of reach to the common consumer until 1975, when Texas Instruments started to mass produce LED watches inside a plastic case. These watches, which first retailed for only $20,^[18] reduced to $10 in 1976, saw Pulsar lose $6 million and the Pulsar brand sold to Seiko.^[19]

An early LED watch that was rather problematic was The Black Watch made and sold by British company Sinclair Research in 1975. This was only sold for a few years, as production problems and returned (faulty) product forced the company to cease production.

A digital watch displaying the time, seconds, and date

Most watches with LED displays required that the user press a button to see the time displayed for a few seconds, because LEDs used so much power that they could not be kept operating continuously. Usually the LED display color would be red. Watches with LED displays were popular for a few years, but soon the LED displays were superseded by liquid crystal displays (LCDs), which used less battery power and were much more convenient in use, with the display always visible and no need to push a button before seeing the time. Only in darkness you had to press a button to lit the display with a tiny light bulb, later illuminating LEDs. The first LCD watch with a six-digit LCD was the 1973 Seiko 06LC, although various forms of early LCD watches with a four-digit display were marketed as early as 1972 including the 1972 Gruen Teletime LCD Watch, and the Cox Electronic Systems Quarza.^[20] In Switzerland, Ebauches Electronic SA presented a prototype eight-digit LCD wristwatch showing time and date at the MUBA Fair, Basle, in March 1973, using a Twisted Nematic LCD manufactured by Brown, Boveri & Cie, Switzerland, which became the supplier of LCDs to Casio for the CASIOTRON watch in 1974.^[21]

From the 1980s onward, digital watch technology vastly improved. In 1982 Seiko produced a watch with a small television screen built in,^[22] and Casio produced a digital watch with a thermometer as well as another that could translate 1,500 Japanese words into English. In 1985, Casio produced the CFX-400 scientific calculator watch. In 1987 Casio produced a watch that could dial your telephone number and Citizen revealed one that would react to your voice. In 1995 Timex released a watch which allowed the wearer to download and store data from a computer to their wrist. Some watches, such as the Timex Datalink USB, feature dot matrix displays. Since their apex during the late 1980s to mid 1990s high technology fad, digital watches have mostly become simpler, less expensive time pieces with little variety between models.

Despite these many advances, almost all watches with digital displays are used as timekeeping watches. Expensive watches for collectors rarely have digital displays since there is little demand for them. Less craftsmanship is required to make a digital watch face and most collectors find that analog dials (especially with complications) vary in quality more than digital dials due to the details and finishing of the parts that make up the dial (thus making the differences between a cheap and expensive watch more evident).

Functions[link]

The Rolex Submariner, an officially certified chronometer

All watches provide the time of day, giving at least the hour and minute, and usually the second. Most also provide the current date, and often the day of the week as well. However, many watches also provide a great deal of information beyond the basics of time and date. Some watches include alarms. Other elaborate and more expensive watches, both pocket and wrist models, also incorporate striking mechanisms or repeater functions, so that the wearer could learn the time by the sound emanating from the watch. This announcement or striking feature is an essential characteristic of true clocks and distinguishes such watches from ordinary timepieces. This feature is available on most digital watches.

A complicated watch has one or more functions beyond the basic function of displaying the time and the date; such a functionality is called a complication. Two popular complications are the chronograph complication, which is the ability of the watch movement to function as a stopwatch, and the moonphase complication, which is a display of the lunar phase. Other more expensive complications include Tourbillon, Perpetual calendar, Minute repeater, and Equation of time. A truly complicated watch has many of these complications at once (see Calibre 89 from Patek Philippe for instance). Some watches can both indicate the direction of Mecca^[23] and have alarms that can be set for all daily prayer requirements.^[24] Among watch enthusiasts, complicated watches are especially collectible. Some watches include a second 12-hour display for UTC (as Pontos Grand Guichet GMT).

The similar-sounding terms chronograph and chronometer are often confused, although they mean altogether different things. A chronograph has a stopwatch complication, as explained above, while a chronometer watch has a high quality mechanical or a thermo-compensated movement that has been tested and certified to operate within a certain standard of accuracy by the COSC (Contrôle Officiel Suisse des Chronomètres). The concepts are different but not mutually exclusive; so a watch can be a chronograph, a chronometer, both, or neither.

Timex Datalink USB Dress edition from 2003 with a dot matrix display; the Invasion video game is on the screen

Many computerized wristwatches have been developed, but none have had long-term sales success, because they have awkward user interfaces due to the tiny screens and buttons, and a short battery life. As miniaturized electronics became cheaper, watches have been developed containing calculators, tonometers, barometers, altimeters, a compass using both hands to show the N/S direction, video games, digital cameras, keydrives, GPS receivers and cellular phones. In the early 1980s Seiko marketed a watch with a television in it. Such watches have also had the reputation as unsightly and thus mainly geek toys. Several companies have however attempted to develop a computer contained in a wristwatch (see also wearable computer).

Braille watches have analog displays with raised bumps around the face to allow blind users to tell the time. Their digital equivalents use synthesised speech to speak the time on command.

Uses[link]

Fashion[link]

Wristwatches are often appreciated as jewelry or as collectible works of art rather than just as timepieces. This has created several different markets for wristwatches, ranging from very inexpensive but accurate watches (intended for no other purpose than telling the correct time) to extremely expensive watches that serve mainly as personal adornment (featuring jewel bearings to hold gemstones) or as examples of high achievement in miniaturization and precision mechanical engineering.

Traditionally, men's dress watches appropriate for informal (business), semi-formal, and formal attire are gold, thin, simple, and plain, but increasingly rugged, complicated, or sports watches are considered acceptable for such attire. Some dress watches have a cabochon on the crown and many women's dress watches have faceted gemstones on the face, bezel, or bracelet. Some are made entirely of facetted sapphire (corundum).^[25]

Many fashion and department stores offer a variety of less-expensive, trendy, "costume" watches (usually for women), many of which are similar in quality to basic quartz timepieces but which feature bolder designs. In the 1980s, the Swiss Swatch company hired graphic designers to redesign a new annual collection of non-repairable watches.

Most companies that produce watches specialize in one or some of these markets. Companies such as Patek Philippe, Blancpain and Jaeger-LeCoultre specialize in simple and complicated mechanical dress watches; companies such as Omega SA, Ball Watch Company, TAG Heuer, Sinn, Breitling, Panerai and Rolex specialize in rugged, reliable mechanical watches for sport and aviation use. Companies such as Casio, Timex, and Seiko specialize in watches as affordable timepieces or multifunctional computers.

Trade in counterfeit watches, which mimic expensive brand-name watches, constitutes an estimated US$1 billion market per year.^[26]

Space[link]

The Omega Speedmaster, selected by U.S. space agencies

Zero gravity environment and other extreme conditions encountered by astronauts in space requires the use of specially tested watches. On April 12, 1961, Yuri Gagarin wore a Shturmanskie (a transliteration of Штурманские which actually means "navigator's") wristwatch during his historic first flight into space. The Shturmanskie was manufactured at the First Moscow Factory. Since 1964, the watches of the First Moscow Factory have been marked by the trademark "ПОЛЕТ", transliterated as "POLJOT", which means "flight" in Russian and is a tribute to the many space trips its watches have accomplished. In the late 1970s, Poljot launched a new chrono movement, the 3133. With a 23 jewel movement and manual winding (43 hours), it was a modified Russian version of the Swiss Valjoux 7734 of the early 1970s. Poljot 3133 were taken into space by astronauts from Russia, France, Germany and Ukraine. On the arm of Valeriy Polyakov, a Poljot 3133 chronograph movement-based watch set a space record for the longest space flight in history.^[27]

Astronaut Nancy J. Currie wears the Timex Ironman Triathlon Datalink model 78401 during STS 88.

Through the 1960s, a large range of watches were tested for durability and precision under extreme temperature changes and vibrations. The Omega Speedmaster Professional was selected by NASA, the U.S. space agency. Heuer became the first Swiss watch in space thanks to a Heuer Stopwatch, worn by John Glenn in 1962 when he piloted the Friendship 7 on the first manned U.S. orbital mission. The Breitling Navitimer Cosmonaute was designed with a 24-hour analog dial to avoid confusion between AM and PM, which are meaningless in space. It was first worn in space by U.S. astronaut Scott Carpenter on May 24, 1962 in the Aurora 7 mercury capsule.^[28] Since 1994 Fortis is the exclusive supplier for manned space missions authorized by the Russian Federal Space Agency. China National Space Administration (CNSA) astronauts wear the Fiyta^[29] spacewatches. At BaselWorld, 2008, Seiko announced the creation of the first watch ever designed specifically for a space walk, Spring Drive Spacewalk. Timex Datalink is flight certified by NASA for space missions and is one of the watches qualified by NASA for space travel. Both the Casio G-Shock DW-5600C and 5600E are Flight-Qualified for NASA space travel.^{[30][31][32][33]} The various Datalink models were used both by cosmonauts and astronauts.

Scuba diving[link]

Seiko 7002-7020 Diver's 200 m on a 4-ring NATO style strap

Watches may be crafted to become water resistant. These watches are sometimes called diving watches when they are suitable for scuba diving or saturation diving. The International Organization for Standardization issued a standard for water resistant watches which also prohibits the term "waterproof" to be used with watches, which many countries have adopted.

Water resistance is achieved by the gaskets which forms a watertight seal, used in conjunction with a sealant applied on the case to help keep water out. The material of the case must also be tested in order to pass as water resistant.^[34]

None of the tests defined by ISO 2281 for the Water Resistant mark are suitable to qualify a watch for scuba diving. Such watches are designed for everyday life and must be water resistant during exercises such as swimming. They can be worn in different temperature and pressure conditions but are under no circumstances designed for scuba diving.

The standards for diving watches are regulated by the ISO 6425 international standard. The watches are tested in static or still water under 125% of the rated (water)pressure, thus a watch with a 200 metre rating will be water resistant if it is stationary and under 250 metres of static water. The testing of the water resistance is fundamentally different from non-dive watches, because every watch has to be fully tested. Besides water resistance standards to a minimum of 100 metre depth rating ISO 6425 also provides eight minimum requirements for mechanical diver's watches for scuba diving (quartz and digital watches have slightly differing readability requirements). For diver's watches for mixed-gas saturation diving two additional requirements have to be met.

Watches are classified by their degree of water resistance, which roughly translates to the following (1 metre = 3.281 feet):^[35]

Some watches use bar instead of meters, which may then be multiplied by 10, and then subtracted by 10. This is because 1 bar is equal to one atmosphere or 10 metres of water (therefore 1 bar at the surface and one more each 10 metres). to be approximately equal to the rating based on metres. Therefore, a 5 bar watch is equivalent to a 40 metre watch. Some watches are rated in atmospheres (atm), which are roughly equivalent to bar.

See also[link]

• American Watchmakers-Clockmakers Institute
• List of watch manufacturers
• Marine chronometer
• National Association of Watch and Clock Collectors
• Tachymeter
• WatchTime Magazine
• Wristwatch computer

References[link]

Further reading[link]

• De Carle, Donald, (Illustrations by E. A. Ayres), Practical Watch Repairing, 3rd edition, New York : Skyhorse Pub., 2008. ISBN 978-1-60239-357-8. Significant information on watches, their history, and inner workings.
• Denn, Mark, "The Tourbillon and How It Works", IEEE Control Systems Magazine, June 2010, IEEE Control Systems Society, DOI 10.1109/MCS.2010.936291.

External links[link]

Look up watch in Wiktionary, the free dictionary.

Wikimedia Commons has media related to: Watch

• Philadelphia Exhibition 1876 Report to the Federal High Council by Ed. Favre-Perret (1877)
• American and Swiss Watchmaking in 1876 by Jacques David
• The Watch Factories of America Past and Present by Henry G. Abbott (1888)
• Watchmaking and the American System of Manufacturing (2009)
• Federation of the Swiss Watch Industry FH
• UK patent GB218487, Improvements relating to wrist watches, 1923 patent resulting from John Harwood's invention of a practical self-winding watch mechanism.
• The Most Expensive Watches

A busy signal (or busy tone or engaged tone) in telephony is an audible or visual signal to the calling party that indicates failure to complete the requested connection of that particular telephone call.

There are several distinctly different types of busy signals:

• a reorder tone, (sometimes called a fast busy signal), indicates that no transmission path to the called number is available;
• an otherwise unspecified busy signal indicates that the called number is occupied or otherwise unavailable;
• this tone sometimes occurs at the end of a call to indicate the other party has hung up. See disconnect supervision.

Many different countries have different signalling tones that act as "busy signals".

	Example of a North American busy signal Listen to a busy signal from North America. Example of an old North American busy signal Listen to a busy signal from North America used prior to 1980.
Problems listening to these files? See media help.

References[link]

• Federal Standard 1037C
• MIL-STD-188

This Awards and achievements succession box's factual accuracy may be compromised due to out-of-date information. Please help improve the article by updating it. There may be additional information on the talk page. (April 2012)

Miley Cyrus
Cyrus at the 2012 People's Choice Awards
Background information
Birth name	Destiny Hope Cyrus
Born	(1992-11-23) November 23, 1992 (age 19) Nashville, Tennessee, U.S.[1]
Genres	Pop,[2] country pop, dance, electropop, teen pop
Occupations	Actress, musician
Instruments	Vocals, guitar, piano
Years active	2001–present
Labels	Walt Disney, Hollywood
Associated acts	Hannah Montana, Billy Ray Cyrus, Demi Lovato
Website	MileyCyrus.com Signature of Miley Cyrus.

Miley Ray Cyrus (born Destiny Hope Cyrus; November 23, 1992) is an American actress and pop singer-songwriter. She achieved wide fame for her role as Miley Stewart/Hannah Montana on the Disney Channel sitcom Hannah Montana.

Cyrus recorded music for the soundtracks, Hannah Montana (2006) and Hannah Montana 2/Meet Miley Cyrus (2007), released by Walt Disney Records. With the success of the Hannah Montana franchise she established herself as a teen idol. In 2007, Cyrus signed to Hollywood Records to pursue a solo career. She embarked upon the Best of Both Worlds Tour the same year, in which she performed as both herself and in character as Hannah Montana. The tour was eventually turned into a high-grossing concert film titled Hannah Montana & Miley Cyrus: Best of Both Worlds Concert (2008). In July 2008, Cyrus released her first solo album, Breakout (2008), which was commercially successful.

She began her foray into film by providing the voice of "Penny" in the animated film Bolt (2008). Cyrus earned a nomination for the Golden Globe Award for Best Original Song for her performance of Bolt's theme song, "I Thought I Lost You". She also reprised her role as Miley Stewart/Hannah Montana in Hannah Montana: The Movie (2009). The Hannah Montana: The Movie' soundtrack introduced her to new audiences within country and adult contemporary markets.

She began to cultivate an adult image in 2009 with the release of The Time of Our Lives (2009), an extended play which presented a more mainstream pop sound, and by filming The Last Song (2010), a coming-of-age drama film. The former included Cyrus's best-selling single, "Party in the U.S.A." (2009). A studio album titled Can't Be Tamed was released in 2010 and presents a new dance-pop sound. The music video and lyrics of the album's lead single, "Can't Be Tamed", portrays a more sexualized image for the entertainer. Cyrus ranked number thirteen on Forbes' 2010 Celebrity 100.^[3] For the 2011 Guinness World Records, she was named the “Most Charted Teenager” following her 29th US Billboard Hot 100 chart entry on November 7, 2009 with “Party in the USA”.^[4]

Early life[link]

Cyrus at the 2010 Academy Awards.

Cyrus was born on November 23, 1992, in Nashville, Tennessee, to Letitia Jean "Tish"^[5] (née Finley) and country singer Billy Ray Cyrus.^[6][7] Her parents named her Destiny Hope because they believed that she would accomplish great things with her life. They gave her the nickname "Smiley", which was later shortened to "Miley", because she smiled so often as a baby.^[8] Cyrus suffers from a mild heart condition causing tachycardia which, though not dangerous, is often bothersome.^[9]

Against the wishes of her father's record company,^[10] Cyrus's parents secretly married a year after Cyrus's birth on December 28, 1993.^[7][11] Tish had two children from a previous relationship: Trace and Brandi. Billy Ray adopted Trace and Brandi when they were young.^[12] She has a half-brother, Christopher Cody, Billy Ray's son from a brief relationship, born the same year as Miley; he grew up with his mother in South Carolina.^[10] Tish and Billy Ray had two more children, Braison and Noah. Cyrus's godmother is entertainer Dolly Parton.^[13] Cyrus was very close to her paternal grandfather, Democratic politician Ronald Ray Cyrus.^[14] Cyrus has paid her grandfather several tributes since his death in 2006, including eventually changing her middle name to "Ray".^[15] According to Cyrus's father, "A lot of people say Miley changed her name to Miley Ray because of Billy Ray, but that's not true. She did that in honor of my dad, because the two of them just loved each other to pieces."^[9]

Cyrus grew up on a 500-acre (2.0 km²) farm in Franklin, Tennessee, a suburb of Nashville,^[16] and attended Heritage Elementary School.^[17] She was raised Christian and was baptized in a Southern Baptist church prior to moving to Hollywood in 2005. She attended church regularly while growing up and wore a purity ring.^[18] Several of Cyrus's siblings also eventually entered the entertainment business: Trace became a vocalist and guitarist for the electronic pop band Metro Station,^[19] Noah became an actress, and Brandi became a guitarist.^[20]

Career[link]

2001–05: Career beginnings[link]

In 2001, when Cyrus was eight, she and her family moved to Toronto, Canada while her father filmed the television series Doc.^[21] Cyrus said watching her father film the show inspired her to pursue acting. After Billy Ray took her to see a 2001 Mirvish production of Mamma Mia! at the Royal Alexandra Theatre, Cyrus grabbed his arm and told him, "This is what I want to do, daddy. I want to be an actress."^[22] She began taking singing and acting classes at the Armstrong Acting Studio in Toronto.^[23] In her first role, Cyrus played a girl named Kylie on Doc.^[8] In 2003, Cyrus was credited under her birth name for her role as "Young Ruthie" in Tim Burton's Big Fish.^[24]

At age 11, Cyrus learned about the casting for what became Hannah Montana, a Disney Channel children's television series about a school girl with a secret double life as a teen pop star. Cyrus sent in a tape auditioning for the show's best friend role, but received a call asking her to audition for the lead, "Chloe Stewart".^[1] After sending in a new tape and flying to Hollywood for further auditions,^[25] Cyrus was told that she was too young and too small for the part.^[25][26] However, her persistence and ability to sing in addition to act led the show's producers to invite her back for further auditions. Cyrus eventually received the lead, renamed "Miley Stewart" after herself, at the age of twelve.^[25] During this time, she also auditioned with Taylor Lautner for the feature film The Adventures of Sharkboy and Lavagirl in 3-D and it came down to her and another actress, but Cyrus started doing Hannah Montana instead.^[27]

As Cyrus's career took off, Tish Cyrus made several critical decisions regarding her daughter's representation. She signed Cyrus with Mitchell Gossett, director of the youth division at Cunningham Escott Slevin Doherty. Gossett, who specializes in creating child stars, had arranged for Cyrus's auditions for Hannah Montana and is credited with "discovering" her.^[28][29] For Cyrus's music career, Tish followed the advice of Dolly Parton, Cyrus's godmother and a singer herself, and signed Cyrus with Jason Morey of Morey Management Group. "Dolly said the Moreys are people you can trust around your daughter," Tish Cyrus recalls, "and she said they have good morals, which is not always the case in this business."^[30] According to trade magazine The Hollywood Reporter, Parton's advice was "the best advice [Tish] could [have gotten] on who should rep her daughter."^[30] Tish also recruited Billy Ray's business manager to manage her daughter's finances. Tish herself continues to co-manage or produce many of Cyrus's career decisions.^[30] For her education, Cyrus enrolled at Options for Youth Charter Schools^[31] and studied with a private tutor on the set of her television show.^[32]

[edit] 2006–07: Hannah Montana and Hannah Montana 2: Meet Miley Cyrus

Cyrus performing on the Best of Both Worlds Tour

Hannah Montana became an instant hit and propelled Cyrus to teen idol status, according to The Daily Telegraph.^[24] The series premiered on March 26, 2006, to the largest audience ever for a Disney Channel show^[33] and soon became one of the highest-rated series on basic cable, elevating Cyrus's wealth and fame along with it.^[34] Time magazine reports that Cyrus's "phenom[enal]" success is due partially to her talent and partially to "Disney learning to use its vast, multimedia holdings" and market Cyrus and Hannah Montana appropriately.^[35] Cyrus eventually became the first artist to have deals in television, film, consumer products, and music within The Walt Disney Company.^[28]

The first single was "The Best of Both Worlds", the theme song to Hannah Montana, which was released on March 28, 2006.^[36] "The Best of Both Worlds" is credited to "Hannah Montana", the pop star Cyrus portrays on the series by the same name. As with other songs credited to Montana, Cyrus typically dressed as the character when performing the song live.^[37] Cyrus's first release under her own name was a cover of James Baskett's "Zip-a-Dee-Doo-Dah", released on April 4, 2006, on the fourth edition of DisneyMania.^[38] Dressed as Hannah Montana, Cyrus opened for The Cheetah Girls on twenty dates of their The Party's Just Begun Tour, beginning on September 15, 2006.^[39] On October 24 of same year, Walt Disney Records released the first Hannah Montana soundtrack. Of the nine tracks on the soundtrack performed by Cyrus, eight were credited to "Hannah Montana" and one, a duet with her father titled "I Learned from You", was credited to Cyrus as herself. The album peaked at number one on the U.S. Billboard 200 chart.^[40]

Cyrus and her father, Billy Ray, performing "Ready, Set, Don't Go" at the Kids' Inaugural: "We Are the Future." – January 19, 2009; Washington D.C.

The second season of Hannah Montana premiered on April 23, 2007, and ran until October 12, 2008.^[41] Cyrus signed a four-album deal with Disney-owned Hollywood Records and, on June 26, 2007, released a double-disc album. The first disc was the soundtrack to the second season of Hannah Montana, while the second, titled Meet Miley Cyrus, was Cyrus's debut album credited to her own name. The double-disc album peaked at number one on the Billboard 200^[42] and was later certified three times platinum by the Recording Industry Association of America (RIAA).^[43] Meet Miley Cyrus generated "See You Again", Cyrus's first single to be released under her own name and her first top ten hit on the Billboard Hot 100.^[44] In fall 2007, Cyrus launched her first tour, the Best of Both Worlds Tour, to promote Meet Miley Cyrus and the Hannah Montana soundtracks. With the Jonas Brothers, Aly & AJ, and Everlife as her opening acts, Cyrus toured from October 17, 2007, to January 31, 2008, with stops in the U.S. and Canada.^[45] Tickets sold out in minutes and were scalped for up to $2,500 and an average of $214, well above their $26–$65 face value.^[46] A Ticketmaster official commented, "Hell hath no fury like the parent of a child throwing a tantrum. People who have been in this business for a long time are watching what's happening, and they say there hasn't been a demand of this level or intensity since The Beatles or Elvis."^[47]

[edit] 2008–09: Breakout, transitions and film career launch

Cyrus at 2008 MTV Video Music Awards

After the end of the Best of Both Worlds Tour in January 2008, Walt Disney Pictures released Hannah Montana & Miley Cyrus: Best of Both Worlds Concert, a 3D concert film of the tour, on February 1, 2008, for what was expected to be a one-week run. The film earned over $31 million^[48] at the box-office and an average of $42,000 per theater, twice the expected total, convincing Disney executives to extend the release for an indefinite run. "We don't want to turn away kids from the theaters who couldn't get into the concerts," said Chuck Viane, Disney's chief of distribution.^[49] The film's soundtrack was released by Walt Disney Records/Hollywood Records on March 11, 2008, and peaked at number three on the Billboard 200.^[50]

On July 22, 2008, Cyrus released her second studio album under her own name, titled Breakout. Cyrus said Breakout was inspired by "what's been going on in my life in the past year."^[51] Cyrus co-wrote eight out of twelve songs on the album.^[51] "Songwriting is what I really want to do with my life forever, [...] I just hope this record showcases that, more than anything, I'm a writer."^[52] The album debuted at #1 on the U.S. Billboard 200 chart^[53] and its lead single, "7 Things", peaked at number 9 on the Billboard Hot 100.^[54][55] She hosted the 2008 CMT Music Awards with her father in April^[56] and the 2008 Teen Choice Awards by herself in August.^[57] Cyrus provided the voice of Penny in the 2008 computer-animated film Bolt, which was released on November 21, 2008, to critical acclaim.^[58] Cyrus also co-wrote and recorded the song "I Thought I Lost You" as a duet with John Travolta for the film, for which she received a Golden Globe nomination.^[59] In September 2009, she participated in the charity single "Just Stand Up!" in support of the anti-cancer campaign Stand Up to Cancer^[60] and in the City of Hope Benefit Concert in support of cancer research and training programs.^[61] She also became involved in Disney's Friends for Change, an environmentalist group, for which she recorded the charity single "Send It On" along with several other Disney Channel stars.^[62]

Cyrus performing on the Wonder World Tour

Cyrus had already begun transitioning to a more grown-up image in late 2008, when her representatives negotiated a deal for novelist Nicholas Sparks to write the screenplay and novel basis for a film that would serve as a star vehicle for Cyrus by introducing her to audiences older than the young fans she had gained through Hannah Montana.^[63] Sparks and co-writer Jeff Van Wie developed The Last Song.^[63] It was important to Cyrus that she not be type cast as a singer: "I didn't want to be a singer in another film. I don't want to do that anymore. You have no idea how many musicals show up on my door. I want to do something a little more serious."^[64] In March 2009, Cyrus published Miles to Go, a memoir co-written by Hilary Liftin chronicling her life through age sixteen.^[65] Cyrus starred as Miley Stewart/Hannah Montana in Hannah Montana: The Movie, released April 10, 2009. Both the film and its soundtrack, which contained twelve songs performed by Cyrus,^[66] achieved commercial success.^[67][68] The soundtrack's lead single, "The Climb", became a Top 40 hit in twelve countries^[69] and introduced Cyrus to listeners outside her typical teen pop audience.^[70] Cyrus had considered ending Hannah Montana after its third season, which finished production on June 5, 2009,^[71] but Disney retained and exercised its option for a fourth season.^[72]

Production on The Last Song lasted from June 15, 2009, to August 18, 2009.^[73] In between, Cyrus launched the third Hannah Montana soundtrack, recorded the extended play The Time of Our Lives (EP), and released the EP's lead single, "Party in the U.S.A."^[74] Cyrus said The Time of Our Lives "is a transitioning album. [...] really to introduce people to what I want my next record to sound like and with time I will be able to do that a little more."^[75] "Party in the U.S.A." debuted at number two on the Billboard Hot 100 for her best-ever ranking on the chart.^[76] The Time of Our Lives was released in conjunction with a clothing line co-designed by Cyrus and Max Azria for Walmart.^[77]

From September 14, 2009, to December 29, 2010, Cyrus toured on her Wonder World Tour to promote Breakout and The Time of Our Lives.^{[citation needed]} On December 7, 2009, Cyrus performed for Queen Elizabeth II and numerous other members of the British Royal Family at the Royal Variety Performance in Blackpool, North West England.^[78]

[edit] 2010–2011: Can't Be Tamed, focus on film career, and Gypsy Heart Tour

Cyrus at 2010 MuchMusic Video Awards soundcheck.

Production on the fourth and final season of Hannah Montana began on January 18, 2010.^[79] In the aftermath of the 2010 Haiti earthquake, Cyrus appeared on the charity singles "We Are the World: 25 for Haiti" and "Everybody Hurts".^[80][81] Her third studio album, Can't Be Tamed, was released on June 21, 2010. The album's first single is the title track, "Can't Be Tamed". The single was released for sale on May 18, 2010, and entered the Billboard Hot 100 at number eight.^[82] Cyrus's costumes and dances while promoting Can't Be Tamed were also considerably more provocative than previous performances, arousing media criticism.^[83] After releasing the album, Cyrus intends to take a break from the music industry in order to focus on her film career.^[84] She commented, "I've not taken, like, acting lessons or anything, but it doesn't mean I don't need to because I'm sure I do [...] I'm probably going to go book an acting coach."^[85] Cyrus has also decided to opt out of college for the same reason, saying "I'm a firm believer that you can go back at any age you want, because my Grandma went back to college at 62 [...] For right now, I really want to focus on my career. I've worked hard to get to where I am now, and I want to enjoy it while it lasts."^[86][87][88]

Cyrus starred in The Last Song, which was released on March 31, 2010, and received generally poor reviews, as did Cyrus's performance.^[89] Nonetheless, the film was commercially successful, grossing more than $88 million at the worldwide box office.^[90] According to box-office analyst Exhibitor Relations, the film marked "a successful transition to adult roles for Miley Cyrus."^[91] The fourth and final season of Hannah Montana began airing on Disney Channel on July 11, 2010, and was ended on January 16, 2011.^[92] Cyrus filmed two more films, LOL: Laughing Out Loud and So Undercover in 2010. In LOL, a remake of a 2008 French teen film of the same name, Cyrus plays "a daughter who is involved with all the wrong kids, doing drugs, failing school, but [...whose] mother has her on this perfect pedestal" and says "[She] just fell in love with the story."^[93] Cyrus' character loses her virginity, smokes cannabis, gets wasted and kisses two girlfriends on the lips.^[94] She will also star in So Undercover, an action comedy film. Cyrus will play the part of "a tough, street-smart private eye hired by the FBI to go undercover in a college sorority."^[95] She learned street fighting for the role.^[95]

Despite her earlier announcement that she'd be focusing more on acting in the future, in February 2011, Cyrus confirmed she had no films lineup and was going to go on tour.^[96] On April 29, 2011, Cyrus embarked on her international Gypsy Heart Tour in South America and ended the tour on July 2, 2011, in Australia. Cyrus hosted Saturday Night Live on March 5, 2011, where she performed in several sketches. She also sang a brief song about her several controversies, such as the bong incident, the photo of her friend and she eating a Twizzler, and the "pole dance" on a hotel pole at the Teen Choice Awards, stating "I'm sorry that I'm not perfect."^[97][98] In March 2011, father Billy Ray Cyrus confirmed on talk show, The View, that Cyrus had been in talks with producer Dr. Luke on a new album.^[99] In July 2011, it was announced that she would record her fourth studio album and she has no plans to sign onto any other film projects.^[100] However, it was reported on August 2, 2011, by Contact Music that Cyrus has signed on to star in a comedy in which she plays a woman who broke a promise to God.^[101]

Cyrus released on YouTube a remix of her song "Liberty Walk" in November 2011, dedicated to the Occupy movement, which she referred to as, "the thousands of people who are standing up for what they believe in."^[102]

[edit] 2012–present: LOL, So Undercover, and focus on music career

LOL came out on May 4th

In January 2012, it was announced that Cyrus would be on Punk'd. Cyrus would be on the show alongside friend and co-star in her new film So Undercover, Kelly Osbourne. Cyrus and Osbourne on an episode of the show would punk reality star and TV personality Khloé Kardashian Odom. They punk Khloe by having a young food delivery man pretends to get his family jewels caught in his zipper while using Miley's bathroom.^[103][104]

On January 24, the album Chimes of Freedom: Songs of Bob Dylan Honoring 50 Years of Amnesty International was released in honor of Bob Dylan, Cyrus covered Dylan's song "You're Gonna Make Me Lonesome When You Go" from his 15th studio album Blood on the Tracks, in which she also made a music video.^[105] Cyrus's version of the song earned positive reviews from music critics.^{[106][107][108]}

In February, Cyrus dropped out of the animated comedy Hotel Transylvania, in which she was meant to play the role of Mavis, the daughter of Dracula who is voiced by Adam Sandler, the movie also stars Andy Samberg, Kevin James, Fran Drescher, and David Spade.^[109] It was later announced that she will be replaced by fellow Disney star and friend Selena Gomez.^[110] She later announced that she dropped out of the film because she wanted to work on her music this year.^[111][112]

Earnings[link]

In 2008, Cyrus earned $25 million, up from her earnings of $18 million in 2007, and was ranked number 35 on Forbes magazine's "Celebrity 100" list.^[113] Parade magazine reported she was the richest teenage celebrity and that her franchise would be worth approximately $1 billion by the end of the year.^[114] In 2009, Forbes ranked her #29 on the Celebrity 100 and reported she had earned a total of $25 million.^[115] Then Cyrus got ranked number thirteen on Forbes' 2010 Celebrity 100 ranking $48 million.^[3] From the $48 million she made between June 2009 to June 2010 made her the no. 4 highest earners under 30 and the youngest on the list.^[116] between June 2010 and June 2011, Cyrus earned $54 million.^[117]

From working on Hannah Montana, Cyrus got paid $15,000 per episode she did on the hit show, making her the 6th highest paid child star on television behind fellow Disney stars Dylan and Cole Sprouse and Keke Palmer with $20,000 for their shows. Also, she is behind friend and Disney star Selena Gomez that makes $25,000 per episode of her show, Nick star Miranda Cosgrove with $180,000 per episode of her show, and one time co-star Angus T. Jones that got paid $250,000 for each episode of his show.^[118] Though she had not got paid as much as other Disney stars,when she was 17 she was named #19 on the "Top 20 World's Richest Female Singers Of All Time" list with over $100 million in 5 years active throughout her career, which made her the youngest female artist on the list.^[119] In 2011, she was named #1 on the "Top 10 Richest Teens in Hollywood" with $120 million.^[120]

Personal life and image[link]

Cyrus on the Red Carpet at VH1 Divas 2009

A Christian, she was baptized in a Southern Baptist church in 2005.^[121]

In February 2008, Cyrus and her friend Mandy Jiroux opened a YouTube account and began posting videos of what they called The Miley and Mandy Show. The show, described as a "YouTube hit," is said to be filmed for fun by Cyrus and Jiroux and to be entirely their work, with Cyrus and Jiroux editing the footage together.^[122]

With Cyrus's increased success came increased media attention. In a May 2008 interview with The Los Angeles Times, Francois Navarre, the proprietor of the X17 photo agency, said Cyrus's market value had picked up considerably after the Vanity Fair photo controversy: "She's started to sell more. [...] It used to be $300, and now it's $2,000 for a picture."^[123] Estimates for a picture of the then-15 year old's first kiss ranged from $30,000 to $150,000.^[123] Navarre noted that Cyrus rarely behaved against her wholesome image or went out without a parent and stated, "She has people waiting for the moment she starts to be less traditional. [...] It's natural. Any teenager. But it's going to come very fast. [...] As soon as her mom lets her go out by herself. It's going to start to be interesting."^[123] Time magazine included her on the 2008 Time 100, the magazine's list of the 100 most influential people in the world. Her write-up was written by former child star Donny Osmond, who warned, "As an idol to tweens the world over, singer-actress Miley Cyrus, 15, is riding a huge tidal wave at the pinnacle of her career; this is as it should be. I hope she enjoys it. [...] Within three to five years, Miley will have to face adulthood. [...] As she does, she'll want to change her image, and that change will be met with adversity."^[124]

Cyrus celebrated her 16th birthday at Disneyland with a charity fundraiser for Youth Service America, a youth volunteer service organization.^{[125][126][127]}

In June 2009, Cyrus ended her nine-month relationship with model Justin Gaston shortly before flying to Georgia to film The Last Song.^[128] While filming later that month, Cyrus began dating her co-star in The Last Song, Australian actor Liam Hemsworth.^[129] She later called him her "first serious boyfriend".^[130] In August 2010, it was confirmed that her relationship with Hemsworth had ended.^[131][132] Cyrus and Hemsworth were seen together a month later, and were reportedly back together.^[133] It was announced in early November that the couple had split again.^[134] They have since rekindled their relationship.^[135]

At the end of 2009, Billboard magazine ranked Cyrus the fourth best-selling female artist^[136] and the fifth best-selling singer overall.^[137] Also in 2009, at the age of sixteen, she became the youngest artist to have four number one albums on the charts.^[138]

Controversies[link]

Cyrus performing at the Kids Inaugural: We Are the Future concert in 2009.

In December 2007, a brief controversy emerged when photos Cyrus had posted on her private MySpace account, depicting her and a female friend sharing a piece of licorice and "almost kissing", were spread across the internet, prompting rumors of lesbianism. Cyrus comments, "For me, I was like, That's two girls—it's not a big deal. But they got spread around. Like someone copied and pasted and said, Omigod, look at this, and blah blah blah."^[139]

In April 2008, several provocative images of Cyrus in her underwear and swimsuit were leaked onto the web by a teenager who hacked Cyrus's Gmail account.^{[140][141][142][143]} Cyrus described the images as "silly, inappropriate shots" and stated, "I am going to make mistakes and I am not perfect. I never intended for any of this to happen and I am truly sorry if I have disappointed anyone."^[144][145] On April 25, 2008, the televised entertainment program Entertainment Tonight reported that Cyrus, then 15, had posed topless for a photoshoot taken by photographer Annie Leibovitz for Vanity Fair.^[146] On April 29, 2008, The New York Times clarified that though the pictures left an impression that she was bare-breasted, Cyrus was wrapped in a bedsheet and was actually not topless.^[147] Some parents expressed outrage at the nature of the photograph, which a Disney spokesperson described as "a situation [that] was created to deliberately manipulate a 15-year-old in order to sell magazines." Gary Marsh, president of entertainment for Disney Channel Worldwide, was quoted by Portfolio magazine to have said, "For Miley Cyrus to be a 'good girl' is now a business decision for her. Parents have invested in her a godliness. If she violates that trust, she won't get it back."^[147] In response to the Internet circulation of the photo and ensuing media attention, Cyrus released a statement of apology on April 27, 2008: "I took part in a photo shoot that was supposed to be 'artistic' and now, seeing the photographs and reading the story, I feel so embarrassed. I never intended for any of this to happen and I apologize to my fans who I care so deeply about."^[147] Leibovitz also released a statement: "I'm sorry that my portrait of Miley has been misinterpreted. The photograph is a simple, classic portrait, shot with very little makeup, and I think it is very beautiful."^[147][148]

In May 2008, Gossett, Cyrus's longtime acting agent, left Cunningham Escott Slevin Doherty for United Talent Agency, partially with the hope of "giving Cyrus the major-agency backing that would support a widening career", according to The Hollywood Reporter.^[30][149] About a year later in June 2009, Cyrus left both Gossett and UTA, which had recently negotiated her deals for The Last Song and the fourth season of Hannah Montana, and joined the Creative Artists Agency, which had already represented her for music.^[150] Nikki Finke, who broke the news, reported, "Is this fair to UTA? Of course not. But I hear the decision was made by Miley's mother Trish [sic] Cyrus".^[151]