Gary Barlow is an English singer-songwriter, pianist and record producer. He is frontman and lead vocalist of British pop group Take That and is the head judge on The X Factor. Barlow is one of Britain's most successful songwriters. He has had two Number 1 singles and a Number 1 album as a solo artist, and has had sixteen top 5 hits, eleven Number 1 singles and seven Number 1 albums with Take That. He is also a five-time recipient of the Ivor Novello Award and has sold over 40 million records worldwide with Take That.

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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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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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Randall Darius "Randy" Jackson (born June 23, 1956) is an American bassist, singer, record producer, music manager, and former A&R executive. He is best known as a judge on American Idol and Executive Producer for MTV's America's Best Dance Crew. Jackson has won a Grammy Award as a producer.

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Jennifer Lynn Lopez (born July 24, 1969), often nicknamed J.Lo, is an American actress, singer, record producer, dancer, fashion designer and television producer. She is the richest person of Latin American descent in Hollywood according to Forbes, and the most influentialHispanic entertainer in the U.S. according to People en Español's list of "100 Most Influential Hispanics". Lopez began her career as a dancer on the television comedy program In Living Color. Lopez subsequently ventured into acting, appearing in numerous successful films including The Cell (2000), The Wedding Planner (2001), Maid in Manhattan (2002), Shall We Dance? (2004) andMonster-in-Law (2005). She has won ALMA Awards for outstanding actress for her work in Selena (1997), Out of Sight (1998) and Angel Eyes(2001). She parlayed her media fame into a fashion line and various perfumes with her celebrity endorsement. In 1999, Lopez released her debut studio album, On the 6. She followed it up with two number one albums on the Billboard 200, J.Lo (2001) and J to tha L-O!: The Remixes (2002). Her third studio album, This Is Me... Then (2002) peaked at number two on the Billboard 200 as well as her fourth studio album, Rebirth (2005). In 2007, Lopez released two albums including her first full Spanish-language album, Como Ama una Mujer and her fifth English studio album Brave. She won the 2003 American Music Award for Favorite Pop/Rock Female Artist and the 2007American Music Award for Favorite Latin Artist. She has sold over 48 million albums worldwide.

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Rubén Blades Bellido de Luna (born July 16, 1948) is a Panamanian salsa singer, songwriter, lawyer, actor, Latin jazz musician, and politician, performing musically most often in the Afro-Cuban and Latin jazz genres. As songwriter, Blades brought the lyrical sophistication of Central American nueva canción and Cuban nueva trova as well as experimental tempos and political inspired Nuyorican salsa to his music, creating thinking persons' (salsa) dance music. Blades has composed dozens of musical hits, the most famous of which is "Pedro Navaja," a song about a neighborhood thug who appears to die during a robbery (his song "Sorpresas" continues the story), inspired by "Mack the Knife." He also composed and sings what many Panamanians consider their second national anthem. The song is titled "Patria" (Fatherland). He is an icon in Panama and is much admired throughout Latin America, and managed to attract 18% of the vote in his failed attempt to win the Panamanian presidency in 1994. In September 2004, he was appointed minister of tourism by Panamanian president Martín Torrijos for a five-year term. He holds law degrees from the University of Panama and Harvard Law School.

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Raúl Alejandro Escajadillo Peña (born September 29, 1969 in Mérida, Yucatán, Mexico), better known as Aleks Syntek, is a Mexicansinger, songwriter and producer.

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Sir James Paul McCartney, MBE (born 18 June 1942), is an English singer-songwriter, poet, composer, multi-instrumentalist, entrepreneur, record and film producer, painter, and animal rights and peace activist. Formerly of The Beatles and Wings, McCartney is the most successful songwriter in the history of popular music. McCartney gained worldwide fame as a member of The Beatles, alongside John Lennon, George Harrison, and Ringo Starr. McCartney and Lennon formed one of the most influential and successful songwriting partnerships and wrote some of the most popular songs in the history of rock music. After leaving The Beatles, McCartney launched a successful solo career and formed the band Wings with his first wife, Linda Eastman, and singer-songwriter Denny Laine. He has worked on film scores and classical and electronic music, released a large catalogue of songs as a solo artist, and taken part in projects to help international charities.

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Mary Jane Blige (born January 11, 1971), more commonly known as Mary J. Blige, is an American recording artist, record producer and actress. She has sold more than forty eight million albums worldwide. She has received over twenty-six Grammy Award nominations for her work, winning ten, and has been awarded the World Music Legends Award for combining hip hop and soul together. Blige's vocal range registers from alto to mezzo-soprano, but mostly performs in the mezzo-soprano range. Blige cites Anita Baker and Aretha Franklin as two of the most influential vocalists in her life.

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William "Smokey" Robinson, Jr. (born February 19, 1940) is an American R&B and soul singer-songwriter, record producer, and former record executive. Robinson is noted for being one of the primary figures associated with Motown Records, second only to the company's founder, Berry Gordy. Robinson's countless hits, and consistent contributions to the Motown label earned him the title of the "King of Motown". As both a member of Motown group The Miracles and a solo artist, Robinson recorded thirty-seven Top 40 hits for Motown between 1960 and 1987, and also served as the company's vice president from 1961 to 1988.

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