Taylor Swift has gotten a lot of flack about her breakup songs in the past, but this time it isn’t an ex she’s going after—it’s a former lady friend!

The 24-year-old songstress sat down with Rolling Stone and dished on why she wrote a song titled “Bad Blood” on her upcoming album 1989—about another female artist she declined to name—though many are assuming it’s about Katy Perry!.

katy and taylor

“For years, I was never sure if we were friends or not,” she tells the mag.

“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?’”

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Then, the music mag reports, the woman in question took it too far.

“She did something so horrible,” Tay 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.”

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While we’re especially amused by the fact it’s not about a man—more specifically, her own surprise at this fact—we’re especially relived for John Mayer, at least someone made it out of this conflict scot-free…

Katy added fuel to the fire with a passive aggressive tweet:

“Watch out for Regina George in sheep’s clothing…” the 29-year-old wrote, referencing Mean Girls.

Yikes—sounds like this is turning in to a true catfight between the two self-proclaimed cat ladies! They aren’t the first people in Hollywood to butt heads—check out seven more celebrity feuds!