Gnarls Barkley, St. Elsewhere (2006)

Label: Downtown/Atlantic

B.o.B: “If you were already an Outkast fan, or just a fan of the Dungeon Family movement, you used to follow it and could appreciate the music. But ‘Crazy,’ man? That song did a lot for other artists.

“Cee-Lo was already part of Goodie Mob, which is one of the greatest rap groups of all time. So to do something that eclectic and all the way left—and for it to be a classic— made other artists think, ‘Shit... I don’t have to keep all of these songs sitting on my hard drive.’”