After a successful debut, Gnarls Barkley took a hiatus to pursue solo projects. CeeLo Green released his debut solo album, CeeLo Green and His Perfect Imperfections , while Danger Mouse collaborated with other artists, including MF DOOM and J Dilla.

In 2019, Gnarls Barkley released their third studio album, St. Elsewhere (Deluxe Edition) , which included previously unreleased tracks and remixes. The duo has been working on new material, with CeeLo Green releasing solo music and Danger Mouse collaborating with other artists.

Gnarls Barkley was formed in 2002 by Danger Mouse and CeeLo Green, who met while working on various music projects. The duo gained initial recognition with their debut single "Smiley Faces," which was featured on the soundtrack for the film ATL . However, it was their follow-up single "Crazy" that catapulted them to international fame. Released in 2006, "Crazy" became a massive hit, topping charts worldwide and earning a Grammy nomination for Record of the Year.