Gilbert O'Sullivan (born 1 December 1946) is an Irish-English singer-songwriter, best known for his early 1970s hits "Alone Again (Naturally)", "Clair" and "Get Down". The music magazine Record Mirror voted him the No. 1 UK male singer of 1972.

Worldwide he has charted 16 top 40 discs; including six number one songs, the first of which was 1970's "Nothing Rhymed" (for further information see Gilbert O'Sullivan discography). His most successful recording period was between 1970 and 1980, though he has since recorded nine studio albums up to 2011's "Gilbertville". Speaking in 2009 he said; "I write pop songs. End of story. That's all I wanted to do. That's all I want to do. And that's all I continue to want to do. I have no interest in just touring, and living in the past."

O'Sullivan was born Raymond Edward O'Sullivan in Waterford, Ireland. In 1960, aged 13, his family moved to Swindon, Wiltshire, England. He attended St Joseph's and the Swindon College of Art, where he briefly played drums in a band called Rick's Blues, founded by Rick Davies (who later founded Supertramp) and where he developed his lifelong interests in music and art. According to a 1972 interview with O'Sullivan, Davies taught him how to play both drums and piano. Other semi-professional bands he played with while at college include The Doodles and The Prefects.

Elvis Aaron Presley (January 8, 1935 – August 16, 1977) was one of the most popular American singers of the 20th century. A cultural icon, he is widely known by the single name Elvis. He is often referred to as the "King of Rock and Roll" or simply "the King".

Born in Tupelo, Mississippi, Presley moved to Memphis, Tennessee, with his family at the age of 13. He began his career there in 1954, working with Sun Records owner Sam Phillips, who wanted to bring the sound of African American music to a wider audience. Accompanied by guitarist Scotty Moore and bassist Bill Black, Presley was the most important popularizer of rockabilly, an uptempo, backbeat-driven fusion of country and rhythm and blues. RCA Victor acquired his contract in a deal arranged by Colonel Tom Parker, who would manage the singer for over two decades. Presley's first RCA single, "Heartbreak Hotel", released in January 1956, was a number one hit. He became the leading figure of the newly popular sound of rock and roll with a series of network television appearances and chart-topping records. His energized interpretations of songs, many from African American sources, and his uninhibited performance style made him enormously popular—and controversial. In November 1956, he made his film debut in Love Me Tender.

Justin Drew Bieber ( /ˈbiːbər/ BEE-bər, born March 1, 1994) is a Canadian Pop/R&B singer-songwriter, musician, and actor. Bieber was discovered in 2008 by Scooter Braun, who came across Bieber's videos on YouTube and later became his manager. Braun arranged for him to meet with Usher in Atlanta, Georgia, and Bieber was soon signed to Raymond Braun Media Group (RBMG), a joint venture between Braun and Usher, and then to a recording contract with Island Records offered by L.A. Reid. Bieber's debut single, "One Time", was released in 2009 and peaked in the top twenty in Canada and charted in the top thirty in several international markets. His debut album, the seven-track EP My World, followed in November 2009, and was soon 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.