I vote for 'Fucked For Life' by Dirty Projectors. So ridiculously good both times I've seen them, but the version on 'New Attitude'... its good, I mean its the best thing on the record, but its not got anything approaching the same rock power. Its all inverted. Like they've overcomplicated it.
PS: you can watch a slightly poorly-recorded live version on youtube- http://www.youtube.com/watch?v=K3Xvp9AWhOM
which should give a general idea.
Your turn now.