Gnarls Barkley is an American soul duo composed of the artists Brian Joseph Burton (known professionally as Danger Mouse) and Thomas DeCarlo Callaway (known professionally as Cee Lo Green). Their first studio album St. Elsewhere was released in 2006 along with its first single "Crazy". Both single and album were a major commercial success and have been noted for their large sales by download. The duo released their second album The Odd Couple in March 2008.