Here’s video of a live performance from atheist rapper Greydon Square at the 2007 Atheist Alliance International Convention. The person wearing the black shirt, singing along at times, is Brian Sapient of the Rational Response Squad:
Awesome. Not too often you get to hear an intelligent rap song that includes Pascal’s Wager and the Flying Spaghetti Monster.
(via Atheist Nation, which has 3204023 more awesome videos where this one came from)