Screw up? NoMusicCredits?

So I watched the credits 3 times, and there's no listing of the music in the film. No original score or otherwise. I really wanted to know who did the song played during the closing credits and who the noisey trash band was. Aside from that, this movie was horribly sad, but with a surprisingly happy ending. I love how Ned walks around smiling while wearing a swastika t-shirt, oblivious to how he looks to society. I was pretty pissed when he cheated though. That seemed a little weird.