My brain just melted.
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.
We know, we know. You've heard both of these songs a million times before, and not even an adorable mashup of the two by Pomplamoose might keep you from rolling your eyes and saying "UGH, not AGAIN" (did you do that? Be honest!) But this arrangement is executed well enough to be worth your time, and the music video defies the obvious visuals by paying homage to the 2009 thriller "The Box" (or possibly "Button Button" by Richard Matheson, the short story on which the movie was based).