Elvis Presley

Elvis Aaron Presley (January 8, 1935 – August 16, 1977) was an American singer and actor. Regarded as one of the most significant cultural icons of the 20th century, he is often referred to as "the King of Rock and Roll", or simply, "the King".

Presley was born in Tupelo, Mississippi, as a twinless twin, and when he was 13 years old, he and his family relocated to Memphis, Tennessee. His music career began there in 1954, when he recorded a song with producer Sam Phillips at Sun Records. Accompanied by guitarist Scotty Moore and bassist Bill Black, Presley was an early popularizer of rockabilly, an uptempo, backbeat-driven fusion of country music and rhythm and blues. RCA Victor acquired his contract in a deal arranged by Colonel Tom Parker, who managed the singer for more than two decades. Presley's first RCA single, "Heartbreak Hotel", was released in January 1956 and became a number-one hit in the United States. He was regarded as the leading figure of rock and roll after a series of successful network television appearances and chart-topping records. His energized interpretations of songs and sexually provocative performance style, combined with a singularly potent mix of influences across color lines that coincided with the dawn of the Civil Rights Movement, made him enormously popular—and controversial.

Robbie Williams

Robert Peter "Robbie" Williams (born 13 February 1974) is an English singer, songwriter, and actor. He was a member of the pop group Take That from 1990 to 1995 and again from 2009 to 2012. He has also had commercial success as a solo artist.

Williams rose to fame in the band's first run in the early-to-mid-1990s. After many disagreements with the management and group members, Williams left the group in 1995 to launch a hugely successful solo career, which saw his first seven albums each reach number one in the UK. Williams also released seven number-one singles and found similar success across Europe. On 15 July 2010, it was announced he had rejoined Take That. The group's subsequent album became the second fastest-selling album in UK chart history and the fastest-selling record of the century at the time.Gary Barlow has since confirmed that Williams had left the band for a second time, although the departure was amicable and that Williams was welcome to rejoin the band in the future.

Justin Bieber

Justin Drew Bieber (/ˈbiːbər/; born March 1, 1994) is a Canadian singer, songwriter, and record producer. Bieber released his debut EP, My World, in late 2009. It was certified platinum in the U.S. He became the first artist to have seven songs from a debut record chart on the Billboard Hot 100. Bieber released his first full-length studio album, My World 2.0, in 2010. It debuted at or near number one in several countries and was certified triple platinum in the U.S. It was preceded by his most successful single to date, "Baby".

Following his debut album, he had his first headlining tour, the My World Tour, released the remix albums My Worlds Acoustic and Never Say Never – The Remixes -- and the 3D biopic-concert film Justin Bieber: Never Say Never. He released his second studio album, Under the Mistletoe, in November 2011, when it debuted at number one on the Billboard 200. Bieber released his third studio album, Believe, in 2012. His fourth studio album Purpose was released in November 2015. His U.S. album and singles sales total 44.7 million.

Dr. Dre

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Andre Romelle Young (born February 18, 1965), known by his stage name Dr. Dre, is an American rapper, record producer, and entrepreneur. He is the founder and current CEO of Aftermath Entertainment and Beats Electronics. Dre was previously the co-owner of, and an artist on, Death Row Records. He has produced albums for and overseen the careers of many rappers, including The D.O.C., Snoop Dogg, Eminem, Xzibit, Knoc-turn'al, 50 Cent, The Game and Kendrick Lamar. He is credited as a key figure in the popularization of West Coast G-funk, a style of rap music characterized as synthesizer-based with slow, heavy beats. In 2014, Dr. Dre was ranked as the second richest figure in the American hip hop scene by Forbes with a net worth of $550 million; he is at the top of the 2015 Forbes list, with an estimated pre-tax take of $620 million in 2014.

Dre began his career as a member of the World Class Wreckin' Cru and later found fame with the influential gangsta rap group N.W.A with Eazy-E, Ice Cube, MC Ren, and DJ Yella, which popularized the use of explicit lyrics in rap to detail the violence of street life. His 1992 solo debut The Chronic, released under Death Row Records, led him to become one of the best-selling American performing artists of 1993 and to win a Grammy Award for the single "Let Me Ride". That same year he produced Death Row labelmate Snoop Dogg's quadruple platinum debut Doggystyle, and even molded artists into top-notch producers such as his step-brother Warren G, which led to his multi-platinum debut Regulate...G Funk Era in 1994, and Snoop Dogg's cousin Daz Dillinger which led to the double platinum debut album Dogg Food by Tha Dogg Pound in 1995.