http://www.youtube.com/watch?gl=GB&hl=en-GB
The Axis of Awesome performed a history of pop music using only 4 chords. (Recorded live at the comedy store Sydney.) The Axis comprises of Jordan Raskopoulos, Lee Naimo and Benny Davis and it happens to be their two-year anniversary today.
P.S. They also have a funky and yet pointless little website (which seems like their kind of humor) check it out!