Oeschinen Lake in the Swiss Alps

A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land apart from a river, stream, or other form of moving water that serves to feed or drain the lake. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds.^[1][2] Lakes can be contrasted with rivers or streams, which are usually flowing. However most lakes are fed and drained by rivers and streams.

Natural lakes are generally found in mountainous areas, rift zones, and areas with ongoing glaciation. Other lakes are found in endorheic basins or along the courses of mature rivers. In some parts of the world there are many lakes because of chaotic drainage patterns left over from the last Ice Age. All lakes are temporary over geologic time scales, as they will slowly fill in with sediments or spill out of the basin containing them.

Many lakes are artificial and are constructed for industrial or agricultural use, for hydro-electric power generation or domestic water supply, or for aesthetic or recreational purposes.

Etymology, meaning, and usage of "lake"[link]

Lake Tahoe on the border of California and Nevada

The Caspian Sea is either the world's largest lake or a full-fledged sea.^[3]

The word lake comes from Middle English lake ("lake, pond, waterway"), from Old English lacu ("pond, pool, stream"), from Proto-Germanic *lakō ("pond, ditch, slow moving stream"), from the Proto-Indo-European root *leg'- ("to leak, drain"). Cognates include Dutch laak ("lake, pond, ditch"), Middle Low German lāke ("water pooled in a riverbed, puddle"), German Lache ("pool, puddle"), and Icelandic lækur ("slow flowing stream"). Also related are the English words leak and leach.

There is considerable uncertainty about defining the difference between lakes and ponds, and no current internationally accepted definition of either term across scientific disciplines or political boundaries exists.^{[citation needed]} For example, limnologists have defined lakes as water bodies which are simply a larger version of a pond, which can have wave action on the shoreline or where wind-induced turbulence plays a major role in mixing the water column. None of these definitions completely excludes ponds and all are difficult to measure. For this reason there has been increasing use made of simple size-based definitions to separate ponds and lakes. One definition of lake is a body of water of 2 hectares (5 acres) or more in area,^[4]:331[5] however others^[who?] have defined lakes as waterbodies of 5 hectares (12 acres) and above,^{[citation needed]} or 8 hectares (20 acres) and above^{[citation needed]} (see also the definition of "pond"). Charles Elton, one of the founders of ecology, regarded lakes as waterbodies of 40 hectares (99 acres) or more.^[6] The term lake is also used to describe a feature such as Lake Eyre, which is a dry basin most of the time but may become filled under seasonal conditions of heavy rainfall. In common usage many lakes bear names ending with the word pond, and a lesser number of names ending with lake are in quasi-technical fact, ponds.

In lake ecology the environment of a lake is referred to as lacustrine. Large lakes are occasionally referred to as "inland seas," and small seas are occasionally referred to as lakes, such as Lake Maracaibo, which is actually a bay.

Distribution of lakes[link]

The Seven Rila Lakes are a group of glacial lakes in the Bulgarian Rila mountains.

Wayanad District Kerala India

The majority of lakes on Earth are fresh water, and most lie in the Northern Hemisphere at higher latitudes. Canada, with a deranged drainage system has an estimated 63,504 lakes.^[7] Finland has 187,888 lakes of which 60,000 are large.^[8]

Most lakes have at least one natural outflow in the form of a river or stream, which maintain a lake's average level by allowing the drainage of excess water.^[9] Some lakes do not have a natural outflow and lose water solely by evaporation or underground seepage or both. They are termed endorheic lakes.

Many lakes are artificial and are constructed for hydro-electric power generation, aesthetic purposes, recreational purposes, industrial use, agricultural use or domestic water supply.

Evidence of extraterrestrial lakes exists; "definitive evidence of lakes filled with methane" was announced by NASA^{[citation needed]} as returned by the Cassini Probe observing the moon Titan, which orbits the planet Saturn.

Globally, lakes are greatly outnumbered by ponds: of an estimated 304-million standing water bodies worldwide, 91 percent are 1 hectare (2.5 acres) or less in area (see definition of ponds).^[10] Small lakes are also much more numerous than large lakes: in terms of area, one-third of the world's standing water is represented by lakes and ponds of 10 hectares (25 acres) or less.^{[citation needed]} However, large lakes account for much of the area of standing water with 122 large lakes of 1,000 square kilometres (390 sq mi, 100,000 ha, 247,000 acres) or more representing about 29 percent of the total global area of standing inland water.^{[citation needed]}

Origin of natural lakes[link]

A portion of the Great Salt Lake in Utah, United States

Salt crystals, on the shore of Lake Urmia, Iran

There are a number of natural processes that can form lakes. A recent tectonic uplift of a mountain range can create bowl-shaped depressions that accumulate water and form lakes. The advance and retreat of glaciers can scrape depressions in the surface where water accumulates; such lakes are common in Scandinavia, Patagonia, Siberia and Canada. The most notable examples are probably the Great Lakes of North America.

Lakes can also form by means of landslides or by glacial blockages. An example of the latter occurred during the last ice age in the U.S. state of Washington, when a huge lake formed behind a glacial flow; when the ice retreated, the result was an immense flood that created the Dry Falls at Sun Lakes, Washington.

Salt lakes (also called saline lakes) can form where there is no natural outlet or where the water evaporates rapidly and the drainage surface of the water table has a higher-than-normal salt content. Examples of salt lakes include Great Salt Lake, the Aral Sea and the Dead Sea.

Small, crescent-shaped lakes called oxbow lakes can form in river valleys as a result of meandering. The slow-moving river forms a sinuous shape as the outer side of bends are eroded away more rapidly than the inner side. Eventually a horseshoe bend is formed and the river cuts through the narrow neck. This new passage then forms the main passage for the river and the ends of the bend become silted up, thus forming a bow-shaped lake.

Crater lakes are formed in volcanic craters and calderas which fill up with precipitation more rapidly than they empty via evaporation. Sometimes the latter are called caldera lakes, although often no distinction is made. An example is Crater Lake in Oregon, located within the caldera of Mount Mazama. The caldera was created in a massive volcanic eruption that led to the subsidence of Mount Mazama around 4860 BC.

Gloe Lakes are freshwater lakes that have emerged when the water they consists of has been separated, not considerably long before, from the sea as a consequence of post-glacial rebound.

Some lakes, such as Lake Jackson in Florida, USA, come into existence as a result of sinkhole activity.

Lake Vostok is a subglacial lake in Antarctica, possibly the largest in the world. The pressure from the ice atop it and its internal chemical composition mean that, if the lake were drilled into, a fissure could result that would spray somewhat like a geyser.

Most lakes are geologically young and shrinking since the natural results of erosion will tend to wear away the sides and fill the basin. Exceptions are those such as Lake Baikal and Lake Tanganyika that lie along continental rift zones and are created by the crust's subsidence as two plates are pulled apart. These lakes are the oldest and deepest in the world. Lake Baikal, which is 25-30 million years old, is deepening at a faster rate than it is being filled by erosion and may be destined over millions of years to become attached to the global ocean. The Red Sea, for example, is thought to have originated as a rift valley lake.

Types of lakes[link]

Many lakes can have tremendous cultural importance. The West Lake of Hangzhou has inspired romantic poets throughout the ages, and has been an important influence on garden designs in China, Japan and Korea.^[11]

One of the many artificial lakes in Arizona at sunset.

The crater lake of Volcán Irazú, Costa Rica.

These kettle lakes in Alaska were formed by a retreating glacier.

Ephemeral 'Lake Badwater', a lake only noted after heavy winter and spring rainfall, Badwater Basin, Death Valley National Park.

• Periglacial lake: Part of the lake's margin is formed by an ice sheet, ice cap or glacier, the ice having obstructed the natural drainage of the land.
• Subglacial lake: A lake which is permanently covered by ice. They can occur under glaciers, ice caps or ice sheets. There are many such lakes, but Lake Vostok in Antarctica is by far the largest. They are kept liquid because the overlying ice acts as a thermal insulator retaining energy introduced to its underside by friction, by water percolating through crevasses, by the pressure from the mass of the ice sheet above or by geothermal heating below.
• Glacial lake: a lake with origins in a melted glacier, such as a kettle lake.
• Artificial lake: A lake created by flooding land behind a dam, called an impoundment or reservoir, by deliberate human excavation, or by the flooding of an excavation incident to a mineral-extraction operation such as an open pit mine or quarry. Some of the world's largest lakes are reservoirs like Hirakud Dam in India.
• Endorheic lake, terminal or closed: A lake which has no significant outflow, either through rivers or underground diffusion. Any water within an endorheic basin leaves the system only through evaporation or seepage. These lakes, such as Lake Eyre in central Australia or the Aral Sea in central Asia, are most common in desert locations.
• Meromictic lake: A lake which has layers of water which do not intermix. The deepest layer of water in such a lake does not contain any dissolved oxygen. The layers of sediment at the bottom of a meromictic lake remain relatively undisturbed because there are no living aerobic organisms.
• Fjord lake: A lake in a glacially eroded valley that has been eroded below sea level.
• Oxbow lake: A lake which is formed when a wide meander from a stream or a river is cut off to form a lake. They are called "oxbow" lakes due to the distinctive curved shape that results from this process.
• Rift lake or sag pond: A lake which forms as a result of subsidence along a geological fault in the Earth's tectonic plates. Examples include the Rift Valley lakes of eastern Africa and Lake Baikal in Siberia.
• Underground lake: A lake which is formed under the surface of the Earth's crust. Such a lake may be associated with caves, aquifers or springs.
• Crater lake: A lake which forms in a volcanic caldera or crater after the volcano has been inactive for some time. Water in this type of lake may be fresh or highly acidic, and may contain various dissolved minerals. Some also have geothermal activity, especially if the volcano is merely dormant rather than extinct.
• Lava lake: A pool of molten lava contained in a volcanic crater or other depression. Lava lakes that have partly or completely solidified are also referred to as lava lakes.
• Former: A lake which is no longer in existence. Such lakes include prehistoric lakes and lakes which have permanently dried up through evaporation or human intervention. Owens Lake in California, USA, is an example of a former lake. Former lakes are a common feature of the Basin and Range area of southwestern North America.
• Ephemeral lake, intermittent lake, or seasonal lake: A seasonal lake that exists as a body of water during only part of the year.
• Shrunken: Closely related to former lakes, a shrunken lake is one which has drastically decreased in size over geological time. Lake Agassiz, which once covered much of central North America, is a good example of a shrunken lake. Two notable remnants of this lake are Lake Winnipeg and Lake Winnipegosis.
• Eolic lake: A lake which forms in a depression created by the activity of the winds.
• Vlei, in South Africa, shallow lakes which vary considerably with seasons.
• Epitshelf Lakes, unique lakes which exist on top of a dense saltwater body and are surrounded by ice. These are mostly found in the Arctic.

Characteristics[link]

Lake Päijänne is one of tens of thousands of lakes in Finnish Lakeland.

Lake Mapourika, New Zealand

Lakes have numerous features in addition to lake type, such as drainage basin (also known as catchment area), inflow and outflow, nutrient content, dissolved oxygen, pollutants, pH, and sedimentation.

Changes in the level of a lake are controlled by the difference between the input and output compared to the total volume of the lake. Significant input sources are precipitation onto the lake, runoff carried by streams and channels from the lake's catchment area, groundwater channels and aquifers, and artificial sources from outside the catchment area. Output sources are evaporation from the lake, surface and groundwater flows, and any extraction of lake water by humans. As climate conditions and human water requirements vary, these will create fluctuations in the lake level.

Lakes can be also categorized on the basis of their richness in nutrients, which typically affect plant growth. Nutrient-poor lakes are said to be oligotrophic and are generally clear, having a low concentration of plant life. Mesotrophic lakes have good clarity and an average level of nutrients. Eutrophic lakes are enriched with nutrients, resulting in good plant growth and possible algal blooms. Hypertrophic lakes are bodies of water that have been excessively enriched with nutrients. These lakes typically have poor clarity and are subject to devastating algal blooms. Lakes typically reach this condition due to human activities, such as heavy use of fertilizers in the lake catchment area. Such lakes are of little use to humans and have a poor ecosystem due to decreased dissolved oxygen.

Due to the unusual relationship between water's temperature and its density, lakes form layers called thermoclines, layers of drastically varying temperature relative to depth. Fresh water is most dense at about 4 degrees Celsius (39.2 °F) at sea level. When the temperature of the water at the surface of a lake reaches the same temperature as deeper water, as it does during the cooler months in temperate climates, the water in the lake can mix, bringing oxygen-starved water up from the depths and bringing oxygen down to decomposing sediments. Deep temperate lakes can maintain a reservoir of cold water year-round, which allows some cities to tap that reservoir for deep lake water cooling.

Lake Teletskoye, Siberia

Since the surface water of deep tropical lakes never reaches the temperature of maximum density, there is no process that makes the water mix. The deeper layer becomes oxygen starved and can become saturated with carbon dioxide, or other gases such as sulfur dioxide if there is even a trace of volcanic activity. Exceptional events, such as earthquakes or landslides, can cause mixing which rapidly brings the deep layers up to the surface and release a vast cloud of gas which lay trapped in solution in the colder water at the bottom of the lake. This is called a limnic eruption. An example is the disaster at Lake Nyos in Cameroon. The amount of gas that can be dissolved in water is directly related to pressure. As deep water surfaces, the pressure drops and a vast amount of gas comes out of solution. Under these circumstances carbon dioxide is hazardous because it is heavier than air and displaces it, so it may flow down a river valley to human settlements and cause mass asphyxiation.

The material at the bottom of a lake, or lake bed, may be composed of a wide variety of inorganics, such as silt or sand, and organic material, such as decaying plant or animal matter. The composition of the lake bed has a significant impact on the flora and fauna found within the lake's environs by contributing to the amounts and the types of nutrients available.

A paired (black and white) layer of the varved lake sediments correspond to a year. During winter, when organisms die, carbon is deposited down, resulting to a black layer. At the same year, during summer, only few organic materials are deposited, resulting to a white layer at the lake bed. These are commonly used to track past paleontological events.

Limnology[link]

Lake Billy Chinook, Deschutes National Forest, Oregon.

Lake Cugun, Kirsehir, Turkey.

Limnology is the study of inland bodies of water and related ecosystems. Limnology divides lakes into three zones: the littoral zone, a sloped area close to land; the photic or open-water zone, where sunlight is abundant; and the deep-water profundal or benthic zone, where little sunlight can reach. The depth to which light can reach in lakes depends on turbidity, determined by the density and size of suspended particles. A particle is in suspension if its weight is less than the random turbidity forces acting upon it. These particles can be sedimentary or biological in origin and are responsible for the color of the water. Decaying plant matter, for instance, may be responsible for a yellow or brown color, while algae may cause greenish water. In very shallow water bodies, iron oxides make water reddish brown. Biological particles include algae and detritus. Bottom-dwelling detritivorous fish can be responsible for turbid waters, because they stir the mud in search of food. Piscivorous fish contribute to turbidity by eating plant-eating (planktonivorous) fish, thus increasing the amount of algae (see aquatic trophic cascade). The light depth or transparency is measured by using a Secchi disk, a 20-cm (8 in) disk with alternating white and black quadrants. The depth at which the disk is no longer visible is the Secchi depth, a measure of transparency. The Secchi disk is commonly used to test for eutrophication. For a detailed look at these processes, see lentic ecosystems.

A lake moderates the surrounding region's temperature and climate because water has a very high specific heat capacity (4,186 J·kg⁻¹·K⁻¹). In the daytime a lake can cool the land beside it with local winds, resulting in a sea breeze; in the night it can warm it with a land breeze.

How lakes disappear[link]

Lake Chad in a 2001 satellite image, with the actual lake in blue, and vegetation on top of the old lake bed in green.

Lake Badwater, February 9, 2005. Landsat 5 satellite photo.

Badwater Basin dry lake, February 15, 2007. Landsat 5 satellite photo.

The lake may be infilled with deposited sediment and gradually become a wetland such as a swamp or marsh. Large water plants, typically totos, accelerate this closing process significantly because they partially decompose to form peat soils that fill the shallows. Conversely, peat soils in a marsh can naturally burn and reverse this process to recreate a shallow lake. Turbid lakes and lakes with many plant-eating fish tend to disappear more slowly. A "disappearing" lake (barely noticeable on a human timescale) typically has extensive plant mats at the water's edge. These become a new habitat for other plants, like peat moss when conditions are right, and animals, many of which are very rare. Gradually the lake closes and young peat may form, forming a fen. In lowland river valleys where a river can meander, the presence of peat is explained by the infilling of historical oxbow lakes. In the very last stages of succession, trees can grow in, eventually turning the wetland into a forest.

Some lakes can disappear seasonally. These are called intermittent lakes, ephemeral lakes, or seasonal lakes and can be found in karstic terrain. A prime example of an intermittent lake is Lake Cerknica in Slovenia or Lag Prau Pulte in Graubünden. Other intermittent lakes are only the result of above-average precipitation in a closed, or endorheic basin, usually filling dry lake beds. This can occur in some of the driest places on earth, like Death Valley. This occurred in the spring of 2005, after unusually heavy rains.^[12] The lake did not last into the summer, and was quickly evaporated (see photos to right). A more commonly filled lake of this type is Sevier Lake of west-central Utah.

Sometimes a lake will disappear quickly. On 3 June 2005, in Nizhny Novgorod Oblast, Russia, a lake called Lake Beloye vanished in a matter of minutes. News sources reported that government officials theorized that this strange phenomenon may have been caused by a shift in the soil underneath the lake that allowed its water to drain through channels leading to the Oka River.^[13]

The presence of ground permafrost is important to the persistence of some lakes. According to research published in the journal Science ("Disappearing Arctic Lakes", June 2005), thawing permafrost may explain the shrinking or disappearance of hundreds of large Arctic lakes across western Siberia. The idea here is that rising air and soil temperatures thaw permafrost, allowing the lakes to drain away into the ground.

Some lakes disappear because of human development factors. The shrinking Aral Sea is described as being "murdered" by the diversion for irrigation of the rivers feeding it.

Extraterrestrial lakes[link]

Titan's north polar hydrocarbon seas and lakes as seen in a false-color Cassini synthetic aperture radar mosaic.

At present the surface of the planet Mars is too cold and has too little atmospheric pressure to permit the pooling of liquid water on the surface. Geologic evidence appears to confirm, however, that ancient lakes once formed on the surface. It is also possible that volcanic activity on Mars will occasionally melt subsurface ice, creating large lakes.^{[citation needed]} Under current conditions this water would quickly freeze and sublimate unless insulated in some manner, such as by a coating of volcanic ash.

Only one world other than Earth is known to harbor lakes, Saturn's largest moon, Titan. Photographs and spectroscopic analysis by the Cassini–Huygens spacecraft show liquid ethane on the surface, which is thought to be mixed with liquid methane.

Jupiter's small moon Io is volcanically active due to tidal stresses, and as a result sulfur deposits have accumulated on the surface. Some photographs taken during the Galileo mission appear to show lakes of liquid sulfur on the surface.^[14]

There are dark basaltic plains on the Moon, similar to lunar maria but smaller, that are called lacus (singular lacus, Latin for "lake") because they were thought by early astronomers to be lakes of water.

Notable lakes[link]

Round Tangle Lake, one of the Tangle Lakes, located 2,864 feet (873 m) above sea level in interior Alaska

• Lake Michigan-Huron is the largest lake by surface area: 117,350 km². It also has the longest lake coastline in the world: 8,790 km. If Huron and Michigan are considered two lakes, Lake Superior is the largest lake, with 82,414 km². However, Huron still has the longest coastline at 6,157 km (2980 km excluding the coastlines of its many inner islands). The world's smallest geological ocean, the Caspian Sea, at 394,299 km² has a surface area greater than the six largest freshwater lakes combined, and it's frequently cited as the world's largest lake.
• The deepest lake is Lake Baikal in Siberia, with a bottom at 1,637 m. Its mean depth is also the greatest in the world (749 m).
  It is also the world's largest lake by volume (23,600 km³, though smaller than the Caspian Sea at 78,200 km³), and the second longest (about 630 km from tip to tip).
• The longest lake is Lake Tanganyika, with a length of about 660 km (measured along the lake's center line).
  It is also the second largest by volume and second deepest (1,470 m) in the world, after lake Baikal.
• The world's oldest lake is Lake Baikal, followed by Lake Tanganyika (Tanzania).
• The world's highest lake, if size is not a criterion, may be the crater lake of Ojos del Salado, at 6,390 metres (20,965 ft).^[15]
• The highest large (greater than 250 square kilometers) freshwater lake in the world is the 290 km² Pumoyong Tso (Pumuoyong Tso), in the Tibet Autonomous Region of China, at 28-34N 90-24E, 5,018 metres (16,463 ft) above sea level.^[16]
• The world's highest commercially navigable lake is Lake Titicaca in Peru and Bolivia at 3,812 m (12,507 ft). It is also the largest freshwater (and second largest overall) lake in South America.
• The world's lowest lake is the Dead Sea, bordering Israel and Jordan at 418 m (1,371 ft) below sea level. It is also one of the lakes with highest salt concentration.
• Lake Huron has the longest lake coastline in the world: about 2980 km, excluding the coastline of its many inner islands.
• The largest island in a freshwater lake is Manitoulin Island in Lake Huron, with a surface area of 2,766 km². Lake Manitou, located on Manitoulin Island, is the largest lake on an island in a freshwater lake.
• The largest lake located on an island is Nettilling Lake on Baffin Island, with an area of 5,542 km² and a maximum length of 123 km.^[17]
• The largest lake in the world that drains naturally in two directions is Wollaston Lake.
• Lake Toba on the island of Sumatra is located in what is probably the largest resurgent caldera on Earth.
• The largest lake located completely within the boundaries of a single city is Lake Wanapitei in the city of Sudbury, Ontario, Canada. Before the current city boundaries came into effect in 2001, this status was held by Lake Ramsey, also in Sudbury.
• Lake Enriquillo in Dominican Republic is the only saltwater lake in the world inhabited by crocodiles.
• Lake Bernard, Ontario, Canada, claims to be the largest freshwater lake in the world with no islands.
• The largest lake in one country is Lake Michigan, in the U.S.A. However, it is sometimes considered part of Lake Michigan-Huron, making the record go to Great Bear Lake, Northwest Territories, in Canada, the largest lake within one jurisdiction.
• The largest lake on an island in a lake on an island is Crater Lake on Vulcano Island in Lake Taal on the island of Luzon, The Philippines.
• The northernmost named lake on Earth is Upper Dumbell Lake in the Qikiqtaaluk Region of Nunavut, Canada at a latitude of 82°28'N. It is located only 5.2 kilometers southwest of Alert, the northernmost settlement in the world. There are also several small lakes located north of Upper Dumbell Lake, but they are all unnamed and only appear on very detailed maps.

Largest by continent[link]

The largest lakes (surface area) by continent are:

• Australia – Lake Eyre (salt lake)
• Africa – Lake Victoria, also the third-largest freshwater lake on Earth. It is one of the Great Lakes of Africa.
• Antarctica – Lake Vostok (subglacial)
• Asia – Lake Baikal (if the Caspian Sea is considered a lake, it is the largest in Eurasia, but is divided between the two geographic continents)
• Oceania – Lake Eyre when filled; the largest permanent (and freshwater) lake in Oceania is Lake Taupo.
• Europe – Lake Ladoga, followed by Lake Onega, both located in northwestern Russia.
• North America – Lake Michigan-Huron, which is hydrologically a single lake. However, lakes Huron and Michigan are often considered separate lakes, in which case Lake Superior would be the largest.
• South America – Lake Titicaca, which is also the highest navigable body of water on Earth at 3,821 m above sea level. The much larger Lake Maracaibo is considered by some to be the second-oldest lake on Earth, but since it lies at sea level and nowadays is a contiguous body of water with the sea, others consider that it has turned into a bay.

See also[link]

References[link]

External links[link]

Wikimedia Commons has media related to: Lakes

Look up lake in Wiktionary, the free dictionary.

• Lakes Database
• Lake Classification Systems
• World's Most Beautiful Lakes – slideshow by The Huffington Post

Katy Perry
Katy Perry at the Logie Awards in 2011
Background information
Birth name	Katheryn Elizabeth Hudson
Also known as	Katy Hudson
Born	(1984-10-25) October 25, 1984 (age 27) Santa Barbara, California, U.S.
Genres	Pop, rock, dance, gospel
Occupations	Singer-songwriter, actress
Instruments	Vocals, guitar, piano
Years active	2001–present
Labels	Red Hill, Island, Columbia, Capitol
Associated acts	The Matrix
Website	Katyperry.com

Katheryn Elizabeth Hudson^[1] (born October 25, 1984), known by her stage name Katy Perry, is an American singer, songwriter and actress. Perry grew up with gospel music, and during her first year of high school she pursued a music career as Katy Hudson, releasing her first studio album called Katy Hudson which failed to chart. She recorded a solo album later, which was never released. After signing with Capitol Music Group in 2007, her fourth record label in seven years, she adopted the stage name Katy Perry.

She first gained recognition with the release of her first mainstream album, One of the Boys in 2008, which spawned three Billboard Hot 100 top-ten songs—"I Kissed A Girl", "Hot n Cold" and "Waking Up In Vegas". Perry supported the album with her Hello Katy Tour. In 2010, her third studio album, Teenage Dream (2010), which topped the Billboard 200 chart, and spawned five number one singles—"California Gurls", "Teenage Dream", "Firework", "E.T." and "Last Friday Night (T.G.I.F.)"—Teenage Dream was the only album (after Michael Jackson's Bad)—to do so, and the first female in history to achieve this milestone. She embarked on the California Dreams Tour, which grossed nearly $60 million worldwide.^[2] Perry re-released the album under the name of Teenage Dream: The Complete Confection on March 26, 2012, and the re-release has already spawned the number-one single "Part of Me".

Perry is the only artist to spend over 52 consecutive weeks in the top ten of the Billboard Hot 100, and has since heightened this to 69 weeks.^[3] As of 2012, Perry has been nominated for eight Grammy Awards. She was named 2011's "Artist of the Year" by MTV.^[4] She has sold 37.6 million digital tracks in the United States and 11 million albums worldwide.^[5] Perry was a guest judge on the seventh series of The X Factor UK and the ninth season of American Idol. She has released fragrances "Purr" and "Meow". She ventured into film, voicing Smurfette in the 2011 film The Smurfs. Perry was married to British comedian Russell Brand from 2010 to 2012.

Early life[link]

Perry was born Katheryn Elizabeth Hudson in Santa Barbara, California^[6] to Keith, a West Coast scenester in the 1960s,^[7] and Mary Hudson (née Perry), an evangelist who grew up in Southern California and had a "tempestuous" first marriage in Zimbabwe.^[7] Perry has Portuguese, German, Irish, and English ancestry.^[8][9][10] She is the second child of two pastors.^[11] She has an older sister named Angela Hudson and younger brother named David Hudson.^[12] Perry's mother's aunt and uncle were screenwriter Eleanor Perry and director Frank Perry.^[7] Perry was incorporated into her parents' ministry^[11] and sang in their church between the ages of 9 and 17.^[13] She grew up listening to gospel music,^[14] was not allowed to listen to what her mother called "secular music",^[13][15] and attended Christian schools and camps.^[11] As a child, Perry learned how to dance in a recreation building in Santa Barbara. She was taught by seasoned dancers and began with swing, Lindy Hop, and jitterbug.^[16] She took her GED after her first year at Dos Pueblos High School and decided to leave school in the pursuit of a career in music.^[17] Perry initially started singing "because [she] was at that point in [her] childhood where [she] was copycatting [her] sister and everything she [would do]."^[17] Her sister practiced with cassette tapes, while Perry took the tapes herself when her sister was not around. She rehearsed the songs and performed them in front of her parents, who suggested she take vocal coaching. She grabbed the opportunity and began taking lessons at the age of nine and continued until she was sixteen. She later enrolled in at the Music Academy of the West in Santa Barbara, and studied Italian opera for a short period of time.^[17]

Career[link]

1999–2006: Career beginnings[link]

Perry performing on her guitar, an instrument she learned to play when she was just starting her record career

When Perry was 15, her singing in church attracted the attention of rock veterans from Nashville, Tennessee, who brought her there to polish her writing skills.^[18] In Nashville, Perry started recording demos and was taught by country music veterans how to craft songs and play guitar.^[13][15] Perry signed to the Christian music label Red Hill, under which she recorded her first album at the age of 15.^[19] Performing as Katy Hudson, she released a self-titled gospel rock album in 2001.^[18] She supported this album with The Strangely Normal Tour, accompanied by Phil Joel, LaRue, Luna Halo, Earthsuit and V*Enna.^[20] The album was unsuccessful as the label ceased operations at the end of 2001.^[19] She later changed her surname to Perry, her mother's maiden name, because "Katy Hudson" was too close to film actress Kate Hudson.^[18][21]

Perry performs at the 2008 Warped Tour

At the age of 17, Perry left her home for Los Angeles, where she worked with Glen Ballard on an album for Island Records.^[22] Growing up listening to mostly gospel music, Perry had few references when she began recording songs.^[13] Asked by the producer with whom she would like to collaborate, Perry had no idea. That night, she went with her mother to a hotel. Inside, she turned on VH1 and saw producer Glen Ballard talking about Alanis Morissette;^[13] Ballard produced Morissette's Jagged Little Pill, which had a "huge influence" on Perry.^[18] She expressed interest in working with Ballard to her initial collaborator, who arranged a meeting for her with Ballard in Los Angeles. Perry presented one of her songs to Ballard. Ballard then helped Perry develop her songwriting over the next few years.^[13] The album was due for release in 2005,^[18][19] but Billboard reported it also went nowhere.^[19] Perry was dropped by The Island Def Jam Music Group.^[7] Some of Perry and Ballard's collaborations included "Box", "Diamonds" and "Long Shot", were posted on her official MySpace page. "Simple", one of the songs she recorded with Ballard, was released on the soundtrack to the 2005 film The Sisterhood of the Traveling Pants.^[23][24] "Long Shot" and "I Do Not Hook Up" was later recorded by Kelly Clarkson for her 2009 album All I Ever Wanted.^[25]

Perry signed to Columbia Records in 2004. However, the label was not amenable with her vision, not putting her in the "driver's seat".^[19] Instead, one of Columbia's ideas was to pair Perry with the record production team The Matrix, who was working on an album, to serve as its female vocalist. Although the album was later shelved,^[26] she caught the attention of the music press: Her burgeoning music career led to her being named "The Next Big Thing" in October 2004 by Blender magazine.^[19] With no album project ongoing, Perry began recording her own. Eighty percent completed, however, Columbia decided not to finish it and dropped her from the label.^[19] While waiting to find another label, she worked in an independent A&R company called Taxi Music. In 2006, Perry was featured in the tail-end of the video to P.O.D.'s single "Goodbye for Now".^[27] She made a cameo appearance in Carbon Leaf's video, "Learn to Fly".

[edit] 2007–09: Commercial success with One of the Boys and MTV Unplugged

While in the process of being dropped by Columbia in 2006, the company's publicity executive Angelica Cob-Baehler enthusiastically recommended Perry to Virgin Records chairman Jason Flom.^[28] At the time Flom was leading a complete revival in fortunes at the label and looking to crown recent achievements by breaking a global pop act.^[28] Despite mixed reactions from fellow Virgin executives, Flom became convinced that Perry could be that breakthrough star, and at the start of 2007 extended discussions with Columbia resulted in Perry signing to the newly created Capitol Music Group, a merger between Virgin and Capitol. As part of the deal, the label secured the masters to the unfinished album, recorded while at Columbia, that would go on to form a significant part of her official mainstream debut album, One of the Boys.^[28]

The Columbia recordings were seen by Flom as being "very strong but lacking an undeniable smash or two that would work both at U.S. pop radio and internationally" and so one of the executive's first actions after completing the signing was to set up a collaboration between Perry and the writer-producer Dr. Luke.^[28] The results were the songs "I Kissed a Girl" and "Hot n Cold". Establishing her image was one of the immediate concerns of her management.^[19] A campaign was started in November 2007 with the release of the video to "Ur So Gay", aimed at introducing her to the music market. A digital EP led by "Ur So Gay" was later released to create online buzz and press story.^[11][19][29] This was a successful move that resulted in bringing Perry to the attention of Madonna,^[19] who mentioned her on KISS FM and KRQ's JohnJay & Rich morning show in Arizona. On March 10, 2008, she appeared as herself on the ABC Family television series, Wildfire, on the episode "Life's Too Short".^[30]

Perry during Hello Katy Tour on March 27, 2009

In the next step of promoting the album, Perry undertook a two-month tour of radio stations. The album's official lead single, "I Kissed a Girl", was released on May 6, 2008. Perry's A&R, Chris Anokute, told HitQuarters the song and its controversial theme had met with strong resistance at the label: "People said, 'This is never going to get played on the radio. How do we sell this? How’s this going to be played in the bible belt?'"^[29] Anokute said that they needed the support of one of the label's radio promoters to convince people to believe in the record; otherwise, Perry would have likely been dropped again. Capitol's SVP of Promotions, Dennis Reese, saw the vision and helped push the single on national radio. The first station to pick it up and take a chance was The River in Nashville. After playing it for three days they were innundated with enthusiastic calls.^[29] With the song climbing atop the charts, Perry embarked on the annual Warped Tour music festival, which her management used to "establish her as a credible performer and make sure she wasn't seen as just a one-hit wonder."^[19] The single was a commercial success, peaking at number one for seven weeks on the Billboard Hot 100.^[19] It has since become a major worldwide hit, topping charts in 30 countries,^[26] including Australia, Canada, and the United Kingdom.^[31] On June 12, 2008, Perry appeared as herself on the daytime soap opera The Young and the Restless,^[30] posing for the cover to the June 2008 issue of the fictional magazine Restless Style.^[32] Perry also performed backing vocals on the song, "Another Night in the Hills" from Gavin Rossdale's 2008 solo album Wanderlust.^[33]

One of the Boys was released on June 17, 2008, to mixed critical reviews.^[34] The album has reached number nine on the Billboard 200,^[35] and has been certified platinum by the Recording Industry Association of America.^[36] Perry released her second single, "Hot n Cold", which became her second top three single in dozens of countries around the world, including the United States where it reached number three on the Billboard Hot 100,^[19] as well as topping the charts in Germany, Canada, and Denmark. After Perry wrapped up her appearance at the Warped Tour, she went on tours in Europe. She later launched her first headlining tour, the Hello Katy Tour, in January 2009.^[19] "I Kissed a Girl" earned Perry a nomination for Best Female Pop Vocal Performance at the 2009 Grammy Awards.^[37] Perry was nominated in five categories at the 2008 MTV Video Music Awards, including Best New Artist and Best Female Video, but lost to Britney Spears.^[38] She won Best New Act at the 2008 MTV Europe Music Awards, which she co-hosted,^[39] and Best International Female Artist at the 2009 BRIT Awards.^[40] On February 9, 2009, both "I Kissed a Girl" and "Hot n Cold" were certified three-time platinum by Recording Industry Association of America for individual digital sales of over three million.^[41] The Guinness Book of World Records recognized Perry in its 2010 version as the "Best Start on the US Digital Chart by a Female Artist," for having her first two singles sell over two million digital copies.^[42]

Perry during the Hello Katy Tour in June 2009

The Matrix's self-titled debut album, which features Perry, was later released via the team's label, Let's Hear It, during Perry's solo tour. When the release date was scheduled, "I Kissed a Girl" had been charting well. Matrix member Lauren Christy spoke to Perry about the decision, but she wanted to hold the release until the fourth single of One of the Boys had been dispatched. Despite their communication, The Matrix was released on January 27, 2009, via iTunes Store.^[43]

In December 2008, Perry apologized to British singer Lily Allen for remarks in which she called herself a "skinnier version" of her, saying she meant it as a joke.^[44] Allen retaliated and told a British radio station that she "happen[ed] to know for a fact that she [Perry] was an American version" of her because their record company needed "to find something controversial and 'kooky'" like her.^[45] In January 2009, Perry embarked on her first headlining world tour, the Hello Katy Tour, visiting North America, Europe, Asia, and Australia. Beginning on January 23, 2009, and ending on November 28, 2009, the tour consisted of 89 concerts. During that time, Perry also opened select concerts for the band No Doubt, on their Summer Tour 2009.

On May 16, 2009, Perry performed at the opening ceremony of the annual Life Ball in Vienna, Austria.^[46] In June 2009, lawyers acting for Perry opposed the then-recent trademark of Australian fashion designer Katie Perry, who uses her own name to market loungewear.^[47] Some media outlets reported this as a lawsuit, which Perry denied on her blog.^[48] Katie Perry reported on her blog that at a hearing with IP Australia on July 10, 2009, the singer's lawyers withdrew their opposition to the trademark.^[49] During the summer of 2009 Perry filmed a cameo appearance for Get Him to the Greek; her scene, in which she kisses her future fiancé Russell Brand was cut, and does not appear in the final film. Discussing the issue with MTV, Perry hypothesized there may have been some fear that seeing the two make out would have taken viewers out of the experience.^[50] In 2009, Perry was featured on two singles: in August, a remix of Colorado-based band 3OH!3's song "Starstrukk" (the idea for the collaboration having come after Perry's tour that featured 3OH!3 as the supporting act, the song being released by iTunes on September 8, 2009); and, thereafter, in December, on "If We Ever Meet Again", the fourth single from Timbaland's album Shock Value II.^[51] In October 2009, MTV Unplugged revealed that Perry was one of the artists to perform for them, and that she would be releasing a live album of the performance, including two new tracks, "Brick by Brick" and Fountains of Wayne cover "Hackensack".^[52] The album, released on November 17, included both a CD and a DVD,^[53] and debuted at No. 168 on the US Billboard 200 chart.

[edit] 2010–present: Teenage Dream, film debut and The Complete Confection

Perry at 2011 MTV Video Music Awards

Perry appeared as a guest judge alongside Simon Cowell, Cheryl Cole and Louis Walsh during the Dublin audition stage of the seventh series of the British television show The X Factor on June 28, 2010.^[54] She was one of the many celebrities chosen to fulfil the role of judge whilst Dannii Minogue was on maternity leave. In May 2010, Perry released the first single from her second studio album, Teenage Dream entitled, "California Gurls". The single peaked at number one on the Billboard Hot 100 for six consecutive weeks.^[55][56] "Teenage Dream" was released as the second single from her album, and it also topped the Billboard Hot 100, becoming her third number one and second from the album. Teenage Dream was released August 24, 2010 and debuted atop the Billboard 200 chart with sales of 192,000 copies in its first week.^[57] The album as since sold over 2 million copies in the US, being certified Platinum by the RIAA. Following the album's release, the third single "Firework" was released and became the third consecutive single from Teenage Dream to top the Hot 100. With this, Perry became the first female in eleven years to have three consecutive number-ones from one album.^[58] In February 2011, Perry released the fourth single, "E.T.", a remixed version featuring Kanye West, that peaked at number one on the Billboard Hot 100 for five non-consecutive weeks.^[59] The music video for "E.T." was directed by Floria Sigismondi and features Shaun Ross as the main love interest. With "E.T." at number one on the chart of May 12, 2011, Perry became the first artist to spend 52 consecutive weeks in the top 10 of the Billboard Hot 100.^[3] In June 2011, Perry released the fifth single, "Last Friday Night (T.G.I.F.)". A remixed version featuring American rapper Missy Elliot was released in early August.^[60] The song topped the Billboard Hot 100 on August 17, 2011, making Perry the first female and second artist (tied with Michael Jackson) ever to have five No. 1 singles from one album. Also, when the song reached number 1 in the Pop Songs airplay chart, "Teenage Dream" became the first album to have 5 number 1's from the same album on that chart. Additionally, when the song reached number one in the Adult Pop Songs airplay chart, the album become the first to have 4 number 1's from the same album on the chart.^[61] In October 2011, Perry released the sixth single, "The One That Got Away". It reached No. 3 on Hot 100, becoming the third album in history to produce six top five hit singles,^[62] and the seventh song from Teenage Dream to reach the top of the Billboard Hot Dance Club Songs, the most by any album and setting a new record in the chart.^[63] Perry released a "The One That Got Away" remix featuring American rapper B.o.B. in December 2011. An acoustic version of the song was released in January 2012.^[64]

From February 2011 to January 2012, Perry embarked on an extensive world tour in support of Teenage Dream, the California Dreams Tour, playing 124 shows in Europe, Australasia, Asia, North America and South America and earning over $59 million.^[2] Perry made her perfume debut, releasing a fragrance named "Purr" in November. It is packaged in a cat-shaped bottle, and is available through Nordstrom stores.^[65][66] She followed it up with the fragrance's first flanker, "Meow".^[67][68]

Perry promoting her 2011 fragrance 'Purr'

In July 2011, Perry made her film debut in the 3D family film The Smurfs as Smurfette. The Smurfs earned $557,771,535 worldwide during its theatrical run. Perry appeared at the 2011 MTV Video Music Awards on August 28, 2011. She was nominated for ten awards, received the most nominations of the ceremony and was the first singer to have four different music videos shown in various categories, eventually winning three of those, Video of the Year for "Firework", Best Collaboration and Best Special Effects for "E.T.". On September 17, 2011, marked Perry' 69th consecutive week in the Top 10 with single "Last Friday Night (T.G.I.F.)".^[69][70] On September 23, 2011, she performed, along with Elton John, Brazilian Claudia Leitte and friend Rihanna, on the opening day of the 2011 Rock in Rio festival, which was extended to October 2.^[71] Perry performed for 100 thousand people, a show that received high praise from critics and audience alike.^[72]

On December 14, 2011, the annual list Forbes was elected the third singer who earned more than US$44 million, behind Lady Gaga (US$90 million) and Taylor Swift (US$45 million).^[73] On December 15, 2011, Perry was elected the Artist of the Year by MTV, for their performance on the charts worldwide and won the record during the year.^[4] On December 20, 2011, She released a Barbie doll that represents her style in 2012.^[74] On January 8, 2012, Perry was named the sixth best-selling digital artist of all time in the United States, having sold 37,620,00 million singles and albums as of 2011, according to Nielsen SoundScan.^[75]

In the week ending January 15, 2012, Perry became the first artist ever to have five songs sell over 5 million digital copies in the USA.^[76] Perry was once again recruited by EA Games to promote their new expansion pack The Sims 3: Showtime for their The Sims game franchise. The game content was based on Perry.^[77] Perry became the first person to have six songs top the Billboard Adult Pop Songs chart.^[78] In March 27, 2012, she re-released Teenage Dream under the title Teenage Dream: The Complete Confection on March 27, 2012. The lead single from the re-release (and seventh single from the Teenage Dream era overall) was "Part of Me", which released in February, debuted atop the Billboard Hot 100 chart.^[79] Perry has announced that she will release a part-biopic, part-concert film to be shown in 3D titled Katy Perry: Part of Me to be released on the 4th of July weekend of 2012 by Paramount Pictures.^[80][81] In April 2012, Perry performed in India for the first time at the opening ceremony of 5th edition of Indian Premier League, cricket match, in Chennai along with Indian actors Amitabh Bachchan, Salman Khan, Kareena Kapoor, Priyanka Chopra and Prabhu Deva.^[82][83][84] She performed her songs "Teenage Dream" and a remix version of "California Gurls".^{[85][83][86][87]} In April 2012, Perry stated that she was working on new music and changing her musical style, "My music is about to get real f—ing dark. You'd never see my face because my hair would be in it."^[88]