Without naming names, Swift went on to explain that she and this person had been longtime frenemies - "For years, I was never sure if we were friends or not. She would come up to me at awards shows and say something and walk away, and I would think, 'Are we friends, or did she just give me the harshest insult of my life?'" - until this person acted against her, apparently trying to hire all of Swift's staff from under her and sabotage her arena tour.

"She did something so horrible," Swift says. "I was like, 'Oh, we're just straight-up enemies.' And it wasn't even about a guy! It had to do with business. She basically tried to sabotage an entire arena tour. She tried to hire a bunch of people out from under me. And I'm surprisingly non-confrontational - you would not believe how much I hate conflict. So now I have to avoid her. It's awkward, and I don't like it."

Of course, once the story broke, Swift's obsessive fans did some digging and found that a few of her dancers did go over to Perry's team a few years back. There's also the fact that the two have shared boyfriend John Mayer, which would imaginably add fuel to fire.