PopUps :: A Feud Begins - Katy Perry Subtweets Taylor Swift?

From now until October 27, Taylor Swift will be busy occupying every aspect of your mind, as she gears up to release her fifth album "1989."

In her latest effort to promote her new music and brainwash you, Rolling Stone magazine published a large cover story Monday, detailing the 24-year-old singer's current life (she's now living in NYC and is BFF with Victoria Secret models, Lena Dunham and Lorde and hasn't dated anyone since the release of her 2012 game changer "Red") and what to expect on her upcoming LP.

And what's making headlines this week is a song, only heard by a handful of people, called "Bad Blood" - an aggressive diss track about an unnamed female pop star.

"For years, I was never sure if we were friends or not," Swift says of the unknown singer in Rolling Stone. "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?'"

But things changed 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! 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."

Lovers, haters, fans and trolls have speculated who this female singer could be, and most settled between faceless country singer Carrie Underwood or cheesecake pop star Katy Perry. But it looks like the latter of the two may have answered the question on pop junkies' minds by subtweeting T. Swizzle.

"Watch out for Regina George in sheep's clothing..." Perry, 29, tweeted Tuesday afternoon.

I really shouldn't have to explain who Regina George is, writing for an LGBT publication and all, but just in case: she's the Queen B(itch) in the seminal 2004 comedy "Mean Girls," which I just realized turned 10 this year and makes me want to die a little.

According to Vulture, a commenter pointed out an Examiner article about dancers leaving Swift's tour to team up with Perry.

Though Swifty stressed the feud has nothing to do with a guy, I should throw it out there that they do have a male link: good old John Mayer. Both singers once dated him - Swift created the amazing "Dear John" while Perry starred in Mayer's pretty terrible music video for the late response track "Paper Doll."