Clearly, Swift's song off her 1989 album was inspired by someone. And in an interview with Rolling Stone in 2014 , Swift indicated the subject of the song.Swift said, “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.”And, okay, maybe the feud isn't purely professional, though Swift wouldn't address it. The Rolling Stone article reads, "Pressed, Swift admits there might have been a personal element to the conflict. 'But I don't think there would be any personal problem if she weren't competitive,' she says." It seems there's only a drop of Mayer blood.