Video

Video is an electronic medium for the recording, copying, playback, broadcasting, and display of moving visual media.

Video systems vary greatly in the resolution of the display, how they are refreshed, and the rate of refreshed, and 3D video systems exist. They can also be carried on a variety of media, including radio broadcast, tapes, DVDs, computer files etc.

History

Video technology was first developed for Mechanical television systems, which were quickly replaced by cathode ray tube (CRT) television systems, but several new technologies for video display devices have since been invented. Charles Ginsburg led an Ampex research team developing one of the first practical video tape recorder (VTR). In 1951 the first video tape recorder captured live images from television cameras by converting the camera's electrical impulses and saving the information onto magnetic video tape.

Video recorders were sold for $50,000 in 1956, and videotapes cost $300 per one-hour reel. However, prices gradually dropped over the years; in 1971, Sony began selling videocassette recorder (VCR) decks and tapes to the public.

Music

Music is an art form and cultural activity whose medium is sound and silence. The common elements of music are pitch (which governs melody and harmony), rhythm (and its associated concepts tempo, meter, and articulation), dynamics (loudness and softness), and the sonic qualities of timbre and texture (which are sometimes termed the "color" of a musical sound). Different styles or types of music may emphasize, de-emphasize or omit some of these elements. Music is performed with a vast range of instruments and with vocal techniques ranging from singing to rapping, and there are solely instrumental pieces, solely vocal pieces and pieces that combine singing and instruments. The word derives from Greek μουσική (mousike; "art of the Muses"). In its most general form, the activities describing music as an art form include the production of works of music (songs, tunes, symphonies, and so on), the criticism of music, the study of the history of music, and the aesthetic examination of music. Ancient Greek and Indian philosophers defined music as tones ordered horizontally as melodies and vertically as harmonies. Common sayings such as "the harmony of the spheres" and "it is music to my ears" point to the notion that music is often ordered and pleasant to listen to. However, 20th-century composer John Cage thought that any sound can be music, saying, for example, "There is no noise, only sound."

Katy Perry

Katheryn Elizabeth "Katy" Hudson (born October 25, 1984), known professionally as Katy Perry, is an American singer, songwriter, and actress. After singing in church during her childhood, she pursued a career in gospel music as a teenager. Perry signed with Red Hill Records and released her debut studio album Katy Hudson in 2001, which was commercially unsuccessful. She moved to Los Angeles the following year to venture into secular music after Red Hill ceased operations. After being dropped by The Island Def Jam Music Group and Columbia Records, Perry signed a recording contract with Capitol Records in April 2007.

Perry rose to fame in 2008 with the release of the singles "I Kissed a Girl" – which sparked controversy for its homosexual themes – and "Hot n Cold" from her second album, a pop rock record titled One of the Boys. Her third album, Teenage Dream (2010), ventured into disco, and contained the U.S. Billboard Hot 100 chart-topping singles "California Gurls", "Teenage Dream", "Firework", "E.T.", and "Last Friday Night (T.G.I.F.)" as well as the number-three single "The One That Got Away". The album became the first by a female artist to produce five number-one Billboard Hot 100 songs, and the second overall after Michael Jackson's album Bad. In March 2012, she reissued the album as Teenage Dream: The Complete Confection, which produced the songs "Part of Me" and "Wide Awake".

Nicki Minaj

Onika Tanya Maraj (born December 8, 1982), professionally known by her stage name Nicki Minaj, is a Trinidadian-born American rapper, singer and songwriter. Born in Saint James, Trinidad and Tobago and raised in South Jamaica, Queens, New York, Minaj earned public attention after releasing three mixtapes between 2007–09. She signed a recording contract with Young Money Entertainment in 2009.

Minaj's debut studio album, Pink Friday (2010), peaked at number one on the U.S. Billboard 200 and spawned the top-five single "Super Bass". During that time, Minaj became the first female solo artist to have seven singles simultaneously charting on the U.S. Billboard Hot 100. Her second studio album, Pink Friday: Roman Reloaded (2012), also topped the chart and its lead single, the pop crossover "Starships", peaked at number five on the Billboard Hot 100. Minaj's third studio album, The Pinkprint (2014), was preceded by its second single, "Anaconda", which peaked at number two on the Hot 100 and is her highest-charting single in the United States to date. Minaj made her film debut in the 2012 animated film Ice Age: Continental Drift, and also had a supporting role in the 2014 film The Other Woman. In 2013, she was a judge on the twelfth season of American Idol.

Aca Lukas

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Aleksandar Vuksanović (Serbian Cyrillic: Александар Вуксановић), known by his stage name Aca Lukas (born on 3 November 1968), is a Serbian folk singer. He started performing various music genres, from jazz to Gypsy music. Aca started mixing them into potpourris that became his trademark in years to come. After performing at the clubs Hogar and Lukas, he moved on to the next stage by playing with rock singer Viktorija. Then he started a solo career. His first big hit was the song "Pesma od bola". Then he continued with other hits "Kafana na Balkanu", "Bele ruže" and many more. In 2003, he was arrested in police action "Sablja" because he possessed a non-reported gun. He was having drug and gambling problems that removed him from scene for two years.

He made a comeback in 2006. He won first prize on "II Axel Grand Festival" in 2008. with "Upali svetlo". His first concert at Belgrade Arena was on 3 November 2008. He has since had another two concerts in Belgrade Arena on 3–4 November 2010.