Cee-Lo and Danger Mouse, better known as Gnarls Barkley, slam-dunked on Letterman last night (get it?), performing a slow-burning rendition of “Going On” off their The Odd Couple LP. The guys were, unfortunately, without ridiculous costumes (except for the Big Band era suits).

Gnarls play at the SoHo Apple Store today, before shipping out on a brief UK jaunt, then come back stateside for dates in Denver and Las Vegas, and again shoot across the Atlantic for a European tour in July.