wat was the song common and kanye west did on chapelles show?

Answer 1

Its a freestyle.... here is a link for you.

http://www.comedycentral.com/sitewide/media_player/play.jhtml?itemId=11874


Or

They sang Food. Here is that link.

http://www.last.fm/music/Common+and+Kanye+West/_/Food+%28Live+on+Chapelle%27s+Show%29

Answer 2

According to my son, they performed:
Get Em High - Kanye West, Common and Talib Kweli
Track #9 on The College Dropout

The video clip that is linked above is Workout Plan
Track #10 on The College Dropout
-- but Common isn't performing in that video, so I guess that's not the one you mean.