The CD + DVD package includes a 92-page booklet, four music videos, and bonus songs from live performances.

The group created an elaborate backstory for the "Gnarls Barkley" persona, claiming to be close friends of Lester Bangs, Isaac Hayes, Gordon Gano, and lovers of Janet Jackson and Mariah Carey.

[3] The character taught the band Kraftwerk English, as well as set up a meeting between the group Wu-Tang Clan and members of the Stuckist art movement.

[3] In promotional photographs, the group wears costumes similar to the character Alex from A Clockwork Orange.

[3] In an interview with New York, Gnarls Barkley were asked if they intended to make a contemporary psychedelic record with St.

Producer Danger Mouse agreed, wishing to fuse melody with experimentation like late-1960s music he admired.