A bit like the 4 chords one, but this guy's funnier. Still struggles with the high notes though.

The Four Chords Song

This is pretty cool. I know most music uses the same few chords, but there's obviously a lot of work gone into this. Check it out.

I don't really know much about this band, other than they're called Ok Go and they're most famous for their dancing on their videos. This song is called Here It Goes Again and I thought it was pretty funny.