It looks like there's a little "Bad Blood" boiling between two of music's biggest pop superstars. After Taylor Swift admitted that she penned a new song from 1989 about a fellow female pop star who tried to sabotage an arena tour (probably Katy Perry), the "This Is How We Do" singer fired back at Swift on Twitter.

In her new Rolling Stone cover story, Swift admitted that while she didn't take any inspiration from a breakup on 1989, she did channel real life drama into the album.

"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?" Swift said. "[Then last year] she did something so horrible. I was like, 'Oh, we're just straight-up enemies.' And it wasn't even about a guy!

"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."

Swift then channeled that conflict into "Bad Blood," a forthcoming song from 1989. Fans quickly deduced that Swift was referencing Perry, who reportedly hired dozens of Swift's Red Tour dancers for her own live pursuits.

Though the fan theories are really just that, Perry is indicating that there's some truth to this "Bad Blood," firing off quite the subtweet.

Definitely some "Bad Blood" there!

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