The Axis of Awesome points out that all you need are four chords

[TomM]

The Axis of Awesome points out that all you need are four chords and you can reproduce an astonishing number of pop hits.
https://www.youtube.com/watch?v=5pidokakU4I

[bigG]

Pretty cool, man. ACDC is a four chord wonder.

[imnofish]

I think it's pretty amazing that such a simple structure still allows so much flexibility in its application.  I used to play guitar (before my hands got bad) and my wife began playing and singing in bands at age 16.  We have talked about this very topic with a good friend who has played with several bands over the years.