Mariah Carey

Born in Long Island, NY, on March 27, 1970, Carey moved to New York City at the age of 17 -- just one day after graduating high school -- to pursue a music career; there she befriended keyboardist Ben Margulies , with whom she began writing songs.

Keira Knightley

Keira Christina Knightley was born on March 22, 1985. At 3 years old, she asked her mother for an agent, feeling jealous that she never received the same amount of calls that her parents did. At age 6, the Knightleys agreed to let their daughter have an agent,

provided that she'd study every day during summer holidays.