The Billboard Charts had CeeLo Green.
CeeLo Green . In the United States , `` Crazy '' reached number two on the Billboard Hot 100 . `` Crazy '' is the debut single by Gnarls Barkley , a musical collaboration between Danger Mouse and CeeLo Green , taken from their 2006 debut album St. Elsewhere . It peaked at number two on the Billboard Hot 100 , and topped the charts in the United Kingdom , Denmark , Canada , the Republic of Ireland , New Zealand and other countries .