Even lacking the "St. Elsewhere" element of surprise, Cee-Lo and Danger Mouse knock us sideways with their hotly anticipated second disc. On first single "Run," delirious pop-gospel is set to a '60s-TV beatscape, reminding us that no other current artists are as artful with the retro palette. Check out more Gnarls Barkley music <a href="http://music.download.com/gnarlsbarkley/"><b>here</b></a>.