Play Most Pop Songs With Only Four Chords [VIDEO]

This is Axis Of Awesome, they're are 'The World's Most Awesomest Comedy Band' based out of Australia. In one of their bits they point out that to write a successful pop song you only need to play four chords. Then they go on to demonstrate a medley of songs using only those four chords.

I took piano lessons for three years when I could've learned everything I need to know in about 5 minutes.