"I think there's an emotional undercurrent that expresses how my life has changed priority-wise," Swift said of 1989. "There's nothing overt, nothing that comes out and says 'I only care about my girlfriends now, and I don't need a man to make me happy.' It's just the idea that right now I'm thrilled, excited, fascinated by things other than boys."

"Bad Blood" did just that, focusing on the end of friendship rather than romance. The song, which has been highly speculated to be about a rift between Swift and Katy Perry, went on to inspire one of the biggest music videos of the year.