Vince Vaughn slipped into a suit to stop by Letterman last night to promote Wild West Comedy Show [1]. The movie opens tomorrow, so Vince had plenty to say about putting the movie together and traveling around the country in a tour bus packed with comics. The best part of the interview though, is the clip of Vince trying to convince his on-screen buddy to stay away from steroids for an after school special. Vince looks very young, very '80s, and barely recognizable. Of course, he also had to crack a few jokes making fun of himself after watching the old school clip.

To watch Dave's hilarious interview with Vince, plus more photos, just

Source [2] and Source [3]