In an new interview with GQ with Chuck Klosterman, Taylor Swift gets her public persona pretty carefully scrutinized, especially the story behind her huge hit, "Bad Blood." If you've somehow avoided knowing this (sorry), you're about to read all the hottest gossip from forever ago. Basically, Katy Perry stole a bunch of back-up dancers from Taylor Swift, causing a rift in their friendship that echoed through the halls of pop music and gave us this star-studded video:

Sources: GQ