Caitlin showed me a version of Gotye's "Somebody That I Used To Know" that had been mashed up by Tumblr user pureblood-. They describe it:
Oh my god.
I played the Glee’s version of Somebody That I Used to Know and the original at the same time and I got this.
She had reblogged it, adding the note "horrifying", and showed it to me so that I could share in her shock and disgust. But I actually really liked it.
I can't figure out how to embed it, so here's the link to the player.
I know there wasn't really any artistic intent in overlaying these versions, but I think it really adds something to the feeling of the song. When I first listened to Gotye's original, I found it deeply resonant, in a sort of horribly unpleasant kind of way. As far as the Glee version, well, I wasn't terribly impressed.
But played on top of each other, they create a sort of cacophonous element, that makes it sound like the whole song is screaming inside the way the characters in it are singing about feeling. I understand why a bunch of other people don't enjoy that kind of feeling, but I've always felt that painful emotions are caused by a sort of grating emotional screech caused by the dissonance between your beliefs about the way things should be, and the way they actually are. This overlapping, but narrowly missing, version of "Somebody That I Used To Know" sounds to me a lot like that feeling.