Songwriter known for his work with pop star Justin Bieber. He's written or co-written songs such as "All That Matters," "Recovery," and "What Do You Mean?"
His first significant work was with the group 112, for whom he co-wrote "Dance With Me" and "Peaches & Cream."
He's won four Grammy Awards and his songs have sold more than 350 million records. His nickname is Poo Bear.
He grew up in Connecticut, but was forced to move to Atlanta after a tornado destroyed his house.
He helped write the song "Caught Up" on Usher's 2004 platinum-selling album Confessions.