According to the magazine, Swift has this to say about the unidentified 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 further explained: "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."
Since we don’t yet have Swift's secret-message liner notes to turn to for extra intel, we'll just have to freely speculate about who would dare be a frenemy to America’s BFF.
1. Katy Perry
The Prism singer seems the most likely candidate -- and indeed, Internet detectives are already pointing to the fact that some dancers left Swift's Red Tour in 2013 to go back to dance for Katy on her Prismatic Tour. Additionally, while Swift notes this fallout isn't over a guy, the fact that the two both dated John Mayer probably doesn't help the relationship.
Odds: 2-1, or About As Likely As Taylor Swift Writing Another Boyfriend Takedown Eventually.
2. Demi Lovato
There isn't a whole lot of information out there about Lovato's relationship with Swift, save for the fact that they (alongside Selena Gomez) used to regularly hang out all the time, and these days? (Publicly) not so much. And then there's this quote from Lovato from last year: "A lot of celebrities don't open up to their fans, they just tell them what they want to hear. They don't really tell them things that can benefit their lives, they just, you know, maybe flaunt around a boyfriend and sell a couple of albums." Not so much a backhanded compliment as a straight-up insult.
Odds: 12-1, or About As Likely As Taylor Swift Hosting Saturday Night Live's Premiere Episode.
3. Miley Cyrus
It was just five years ago Swift and Cyrus teamed up to perform "Fifteen" at the 2009 Grammys, but the tabloids have pitted the two stars against each other before for their different styles and performances. Just dumb gossip or is there some truth that the two aren't exactly each other's biggest fans?
Odds: 20-1, or About As Likely As Taylor Swift Adopting Another Cat This Year.
4. Selena Gomez
Fans have wondered how close the onetime inseperrable BFFs are recently, particularly with Gomez possibly getting back together with walking bad idea Justin Bieber, a relationship with which Swift couldn't hide her open disgust. But who among us hasn't at one point or another disliked a friend's boyfriend? Despite the sometimes-speculation, it's clear the two are still close. In the RS profile, Swift jokes about getting Selena to move to NYC with her.
Odds: 50-1, or About As Likely As Taylor Swift Getting Back Together With Harry Styles.
5. Karlie Kloss
Just kidding. Fans learned in the profile that not only is the Victoria's Secret model one of Swift's best friends, she's practically her roommate, with a room in Swift's New York City apartment dedicated just for her use.
Odds: 100-1, or About As Likely As Taylor Swift Never Again Instagramming the Heck Out Of the All-Girls Party She's Throwing.