CeeLo Green has a song.
CeeLo Green . Internationally , Green is best known for his soul work : his most popular was Gnarls Barkley 's 2006 worldwide hit `` Crazy '' , which reached number 1 in various singles charts worldwide , including the UK . The song became a successful single , with the radio-edit version `` Forget You '' , reaching the top spot in the UK and the Netherlands and peaked at number 2 on the US Billboard Hot 100 .