Awful, disgusting song. Bitter her boyfriend dumped her so she's calling the other girl a slut. Immature, condescending, and bitter. Just the same reason Paramore's Misery Business is awful. Pick on the guy who dumped/rejected you, but leave the other girl out of it imo. Same reason I don't like You Belong With Me (picking on the girl who has done nothing to her instead of disliking the guy for passing her up). Nobody can "steal" your boyfriend. idk idk I clearly have a lot of feelings, but I am not here for songs like that. I think it reinforces some unhealthy lines of thinking.
I do like some of her other songs, but when it comes to that one it pushes a button haha
Personally I like it this way. Whenever I get caught cheating, it's the other girl that gets all the blame. I usually get off scot-free.