David John "Dave" Matthews (born January 9, 1967) is a South African-American musician and actor, best known as the lead vocalist, songwriter, and guitarist for the Dave Matthews Band. He performs mainly with acoustic guitar and favors rhythm rather than solos in his playing.

David John Matthews was born in Johannesburg, South Africa, the third of four children of parents John and Valerie Matthews. At two years old, Matthews' family moved to Yorktown Heights in Westchester County, New York, where his father, a physicist, started working for IBM.

In 1974, the family moved to Cambridge, England, for a year before returning to New York, where his father died from lung cancer in 1977. Biographer Nevin Martell argues that Dave's father's death may be an impetus for his "carpe diem" lyrics. At some point while residing in New York, Matthews attended his first concert, when his mother took him to a performance by Pete Seeger. The family moved back to Johannesburg, South Africa, in 1977.

Upon Matthews' graduation from St Stithians College high school in 1985, he was faced with conscription into the South African military just as civil disobedience to the practice was becoming widespread. A Quaker (and consequently pacifist), Matthews left South Africa to avoid service.

Stefani Joanne Angelina Germanotta (/ˈstɛfəniː dʒʌrməˈnɑːtə/ STE-fə-nee jurr-mə-NAH-tə; born March 28, 1986), known by her stage name Lady Gaga, is an American singer and songwriter. Born and raised in New York City, she primarily studied at the Convent of the Sacred Heart and briefly attended New York University's Tisch School of the Arts before withdrawing to focus on her musical career. She began performing in the rock music scene of Manhattan's Lower East Side, and was signed with Streamline Records by the end of 2007. During her employment as a songwriter for the record company, her vocal abilities captured the attention of recording artist Akon, who signed her to his label Kon Live Distribution.

Lady Gaga came to prominence as a recording artist following the release of her debut album The Fame (2008), which was a critical and commercial success that topped charts around the world and included the international number-one singles "Just Dance" and "Poker Face". After embarking on the The Fame Ball Tour, she followed the album with The Fame Monster (2009), which spawned the worldwide hit singles "Bad Romance", "Telephone" and "Alejandro". The album's success allowed her to embark on the eighteen-month long Monster Ball Tour, which later became one of the highest-grossing concert tours of all time. Her most recent album Born This Way (2011) topped the charts of most major markets and generated more international chart-topping singles, including "Born This Way", "Judas" and "The Edge of Glory". Besides her musical career, she involves herself with humanitarian causes and LGBT activism.

Robert James "Bob" Ritchie (born January 17, 1971), known by his stage name Kid Rock, is an American singer-songwriter, musician, multi-instrumentalist and rapper with five Grammy Awards nominations. Kid Rock released several studio albums that mostly went unnoticed before his 1998 record Devil Without a Cause, released with Atlantic Records, sold 11 million albums behind the hits, "Bawitdaba", "Cowboy", and "Only God Knows Why". In 2000, he released The History of Rock, a compilation of remixed and remastered versions of songs from previous albums as well as the hit single, "American Bad Ass" and the previously unreleased "Abortion".

Kid Rock released the follow-up in 2001, Cocky. After a slow start, his country-flavored hit "Picture" with Sheryl Crow resurrected the album and it went gold as a single and pushed the album's sales over 5 million. It was followed by 2003's self-titled release, which went platinum in the USA and reached No. 8 on the Billboard charts. In 2006 he released Live Trucker, a greatest hits live album that went mostly unnoticed.