Brian Joseph Burton, known professionally as Danger Mouse, is an American musician and record producer. He came to prominence in 2004 when he released The Grey Album, which combined vocal performances from Jay-Z's The Black Album with instrumentals from the Beatles' The Beatles, also known as The White Album. In 2008, Esquire named him one of the "75 most influential people of the 21st century".

Gnarls Barkley is an American soul duo composed of singer-songwriter CeeLo Green and producer Danger Mouse. They released their debut studio album, St. Elsewhere, in 2006. It contained their hit single "Crazy", which peaked at number two on the US Hot 100 and topped the UK Singles Chart. It was nominated at the 2007 Grammy Awards for Record of the Year, and was platinum certified for shipping over 1,000,000 records. St. Elsewhere also received a nomination for Album of the Year. The Odd Couple, their second studio album, was scheduled for release in April 2008, but due to a leak of the album over the internet, they decided to release it early. The album in its entirety received similarly positive reviews.