He gained fame with Gnarls Barkley, whose hit song "Crazy" was voted Best Song of the 2000s; his song "Forget You" rose to #2 on the U.S. Billboards.
He co-founded Goodie Mob with Big Gipp, Khujo, and T-Mo, and collaborated with OutKast on their 1994 album, Southernplayalisticadillacmuzik.
He worked with Santana on his 1999 album, Supernatural.
He lost his father when he was two. His mother, a volunteer firefighter, became paralyzed after surviving an auto collision when he was 16 and died when he was 18. He had a child name Kingston with Christina Johnson, who he divorced in 2005.
He served as one of the judges for the TV show, The Voice, with Adam Levine.