The Billboard Charts had 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.
