Gotye's hit of the summer spawned so many YouTube parodies that he assembled literally hundreds of them to create a definitive "YouTube Orchestra" mashup. We'll let him speak for himself:
Reluctant as I am to add to the mountain of interpretations of Somebody That I Used To Know seemingly taking over their own area of the internet, I couldn't resist the massive remixability that such a large, varied yet connected bundle of source material offered.
Think five people performing on one guitar is hard? Try it on an instrument five times smaller.
GENIUS. But please note that we have a zero-tolerance policy for Snorlax jokes in situations like these.