Formed in 2004, Gnarls Barkley consists of former Goodie Mob rapper Cee Lo Green and producer Danger Mouse, born Brian Joseph Burton. With their first album St. Elsewhere, and the 2006 single "Crazy," the duo dominated the music charts. "Crazy" became the first single to top the UK Singles Chart strictly off of download sales alone. They won the 2007 BET Award for Best Group and received three other nominations the same year. Their second collaborative album, The Odd Couple, was released in 2008. In 2011, Cee Lo joined the reality show The Voice.