FreddeGedde posted an amazing cover of Queen's hit song "Killer Queen". You MUST watch it.

I mean, it starts off with just him and you think it's going to be an a cappella cover. Then, he "clones" himself 6 times, so suddenly he's doing a sweet 7-part harmony to the song. 

And if that isn't impressive enough, various clones bust out a keyboard, two guitars, bongos, a recorder and an accordian. Taking this cover from "pretty cool" to "friggin' awesome" just like that.