Justin Bieber is a Canadian pop/R&B singer, songwriter and actor. Bieber was discovered in 2008 by Scooter Braun, who happened to come across Bieber's videos on YouTube and later became his manager. His debut single, "One Time", released worldwide in 2009, peaked in the top ten in Canada and charted in the top thirty in several international markets. His debut release, My World, followed on November 17, 2009, and was eventually certified platinum in the United States. He became the first artist to have seven songs from a debut album chart on the Billboard Hot 100.

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Luis Alberto "Beto" Cuevas Olmedo is the former lead singer of the now-defunct Chilean rock band, La Ley. He grew up in Montréal, Quebec, and is fluent in French, English, and Spanish. He was born in Santiago, Chile, and now resides in Los Angeles, California and is pursuing a solo career.

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John Paul Henry Daniel Richard Grimes and Edward Peter Anthony Kevin Patrick Grimes (born 16 October 1991) are an Irish singing duo, performing under the name Jedward. Known for their distinctive blond quiffs and unique performances, theidentical twins have risen to fame since appearing as John & Edward on the sixth series of The X Factor in 2009, in a phenomenon described as the "Jedward paradox". Their first single, "Under Pressure (Ice Ice Baby)" featuring Vanilla Ice, was released on 31 January 2010. They performed the song as a duet with Vanilla Ice at the National Television Awards ceremony on 20 January 2010. The single is available on Sony Music, and reached number two and one in the UK and Irish charts respectively. Jedward are now managed by X Factor judge Louis Walsh.

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Kelly Brianne Clarkson (born April 24, 1982) is an American singer-songwriter and occasional actress. Clarkson made her debut under RCA Records after she won the first season of the television series American Idol in 2002. Clarkson has released four albums to date: her debut album Thankful (2003), her multi-platinum second album Breakaway (2004) - won twoGrammy Awards, My December (2007), and her latest album All I Ever Wanted (2009). Her first four albums have sold over 10.4 million copies in the United States.

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Bret Michaels (born Bret Michael Sychak; March 15, 1963) is an American singer. best known as the lead vocalist of the glam metal band Poison. Besides his career as lead singer, he has several solo albums to his credit, as well as one chart single. He has also starred in the VH1 reality show Rock of Love with Bret Michaels and its sequels, and as a judge on the talent show Nashville Star.

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Joseph McElderry (born 16 June 1991) is an English singer from South Shields, Tyne and Wear, England near Newcastle Upon Tyne. He won the sixth series of the ITV show The X Factor in 2009.

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Tommy Lee (b. October 3, 1962) is an American musician, and founding member of glam metal band Mötley Crüe. As well as being the band's long-term drummer, Lee founded rap-metal band Methods of Mayhem, and has pursued solo musical projects.

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Phillip Calvin McGraw (born September 1, 1950), best known as Dr. Phil, is an American television personality, author, and former psychologist, currently the host of his own television show, Dr. Phil, which debuted in 2002. McGraw first gained celebrity status with appearances on The Oprah Winfrey Show in the late 1990s.

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John Scot Barrowman (born 11 March 1967) is a Scottish-born British American singer, actor, dancer, musical performer and media personality, with dual citizenship in the UK and the US. Barrowman is best known on British television for his acting and presenting work for the BBC. His most prominent television role has been as Captain Jack Harkness in Doctor Who and its spin-off series Torchwood. He has featured in such light entertainment shows as Live & Kicking,Any Dream Will Do, How Do You Solve A Problem Like Maria?, and I'd Do Anything as well as appearing on the celebrity ice skating show Dancing on Ice. As a result of his family's move to Illinois when he was eight years old, Barrowman speaks in an American accent on screen but speaks with a Scottish accent when with family or in Scotland. Barrowman is openly gay. He was voted the 2006 Stonewall "Entertainer of the Year" and was third in Broadcast magazine's "Hottest Commodity" poll in November 2006. Barrowman appeared as a guest act for the Royal Variety Performance, which was staged at the London Palladium on Thursday 11 December 2008.

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