CeeLo Green is on the charts.
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 . Gnarls Barkley 's second album , The Odd Couple ( 2008 ) , charted at number 12 on the Billboard 200 .