R F Brown

This was done by an Australian comedy group called Axis of Awesome.

link:   YouTube – 4 Chords , 36 Songs (Unbelievable!!!!) 36 songs can be sung on 4 chords! listen!!

It’s I V vi IV.  One chord, five chord, and four chord all major, minor six chord in the middle  leads into the four chord, four chord leads back to the one.   Get it?  All the songs follow the same progression although not always in the same key.