Nicki Minaj and Will.i.am both perform “Check It Out” Live on the Late Show with David Letterman from October 5th, 2010.

Check out Nicki Minaj’s outrageous facial expressions while she performs, and Will.i.am’s “astro-boy” hair he’s always been rocking in a different color lately.

Nicki Minaj & Will.i.am performing “Check It Out” October 5th 2010

Listen/Download: Nicki Minaj & Will.i.am – Check It Out