VIDEO: Lupe Fiasco - Superstar ft Matthew Santos (Live @ Letterman)

For some unexplained reason Matthew Santos's presence, anywhere, irks me. Maybe it's because he's so affected, or maybe it's his haircut or the fact that he kind of looks like Adam Levine of Maroon 5. But props must be given, this performance with Lupe Fiasco on last night's comeback episode of Letterman is classy. The Cool is out in stores right now and really growing on me.