So, this song is hot. that's all there is to it.
the percussion and guitar overdrive just add to the raw edge that is carly's bitterness. the repetition of words only drives her point home. It also adds to it that before she repeats the words she sings over a held chord for a couple of bars. This ensures the audience is listening :)
Background vocals are not brilliant, but they add some depth to the chorus texture. The guitar solo and piano solo break up the somewhat strophic form of carly's rant.
there, it's strophic, and i like it. and we all know the words. and the guy's wearing an apricot scarf. and he's gavotting!!! it doesn't get much better than that.