Danger Mouse changed everything. With the release of the DJ's beautifully produced The Grey Album, a 2004 mash-up of Jay-Z’s The Black Album and The Beatle’s The White Album, Brian Joseph Burton legitimized the mixtape as a genuine and beautiful art form. Although The Grey Album was released for free, it solidified Danger Mouse’s commercial career as he went on to produce with the likes of the Gorillaz, Gnarls Barkley, Dangerdoom, and Beck.
