Taylor Swift is known for writing songs about her breakups, but on her new album, 1989, she's taking a slightly different approach. The 24-year-old dished about the song called Bad Blood in latest Rolling Stone issue and revealed that it's about a fellow female celebrity.

"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? [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!" Swift said in the interview published online on Monday. "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." 

Speculators quickly assumed that Swift was talking about Katy Perry, who also dated John Mayer. The Washington Post also pointed out that some of Swift's backup dancers left her Red tour last year and joined Perry's Prism shows. Dancer Lockhart Brownlie confirmed that Perry had called him and the two other dancers and asked them to join her new tour.

"Obviously we were with Katy for 2 1/2 years, she's like family to us, so we were, like, 'absolutely','' he told Examiner.com in an interview in 2013. "We weren't really dancing in Taylor's tour anyway so I had got a little bored and I really wanted to do a promo tour."

On Tuesday, Perry wrote a subliminal message on Twitter, which many believe could be for Swift. "Watch out for the Regina George in sheep's clothing..." the singer tweeted in reference to Rachel McAdams' cruel character in Mean Girls.

Tags: Katy Perry Taylor Swift