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 Taylor Swift’s feud with Katy Perry did start over a guy — and sources tell Page Six it was John Mayer. 
 
 After Swift mentioned a “straight-up enemy” about whom she’s written a new song, “Bad Blood,” in an interview with Rolling Stone, Perry tweeted to call out a mystery mean girl, “Watch out for Regina George in sheep’s clothing.” 
 
 Swift said in the interview, “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 . . . I don’t think there would be any personal problem if she weren’t competitive.” 
 
 Taylor and Mayer had a love affair in 2010 before he dumped her. 
 
 She released the song “Dear John” with lyrics, “Don’t you think 19’s too young to be played by/Your dark twisted games.” 
 
 In 2012, Perry started dating Mayer, who said he was “really humiliated” by Swift’s song. Music sources told Page Six, “Perry started making digs at Taylor from then on.” 
 
 While it was reported that several dancers left Swift’s tour for Perry’s last year, Swift appeared to confirm earlier tensions between them, telling Rolling Stone, “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?’ ” 
 
 Reps for the two singers, who were seated in different sections at the recent VMAs, didn’t get back to us. ||||| Courtesy of Camilla Akrans for Harper's BAZAAR 
 
 Katy is the October cover girl for ‘Harper’s Bazaar’ and she looks absolutely stunning! But we’ve got to admit we love her even more for her amazingly candid interview about get her heartbroken by Russell Brand and John Mayer! 
 
 Katy Perry is so good about being honest with her millions of fans and she does it again in the October issue of Harper’s Bazaar. Katy, 29, who has amassed more than 56 million Twitter followers, says that even she hasn’t figured out her love life. Despite having all the fame 
 
 Katy Perry — I Had To Get Therapy After John Mayer Break Up 
 
 The singer doesn’t hold back when talking about her break ups, in fact, she says that she couldn’t have gotten through all of it if it wasn’t for her “oracle” of a therapist. 
 
 Katy and Russell Brand divorced in 2012, and shortly after she began dating John Mayer. The two split up in February of 2014. 
 
 What I’ve learned is that if you don’t have the foundation of self-love first, you really have nowhere to pull love from to give it away. I had to learn about taking care of myself before I could take care of others. I want to mommy everyone. I want to take care of them. I want to save them, and I forget myself in the meantime. I learned that through therapy. 
 
 Katy Feuding With Taylor Swift? 
 
 In the midst of her gorgeous coverage, Katy is having a battle with pop star, Taylor Swift. Taylor spoke to Rolling Stone and claimed that she was feuding with a big A-list singer but wouldn’t say who. Now all signs point to it being Katy, all over an issue with their back up dancers. 
 
 A report by TMZ claims that Katy hired some of Taylor’s dancers away, which were Katy’s to begin with. Now Taylor feels as though it almost derailed her entire tour, which it ultimately didn’t. Taylor claims it’s not over a guy, which is clearly in reference to Katy and Taylor both having dating John. Yikes! 
 
 HollywoodLifers, should Katy stay single for a while? 
 
 — Chloe Melas 
 
 More Katy Perry News: 
 
 JavaScript is required to load the comments. ||||| Katy Perry is ready to "let it go." 
 
 During a conversation with Arianna Huffington, live streamed to promote her new album Witness, on Saturday, the 32-year-old singer opened up about her feud with Taylor Swift, revealing that she thinks "it's time" for the two to make amends. 
 
 
 
 WATCH: Katy Perry Slams Taylor Swift for 'Trying to Assassinate My Character': 'That's So Messed Up' 
 
 "I'm ready to let it go. Absolutely, 100 percent," Perry expressed. "I forgive her, and I'm sorry for anything I ever did, and I hope the same from her, and I think it's actually... I think it's time." 
 
 "There are bigger fish to fry, and there are bigger problems in the world," she continued. "I love her and I want the best for her, and I think she's a fantastic songwriter, and like, I think that if we both, her and I, can be representatives of strong women that come together despite their differences, I think the whole world is going to go, like, 'Yeah, we can do this.'" 
 
 "Maybe I don't agree with everything she does, and maybe she doesn't agree with everything I do, but like, I just... I really, truly, want to come together, and in a place of love and forgiveness, and understanding and compassion," Perry said. 
 
 Though Perry dated Swift's ex-boyfriend, John Mayer, in 2012, their feud supposedly started when Perry hired backup dancers from Swift's tour years ago. Swift then hired Perry's longtime songwriter, Max Martin, to help write her 2014 hit, "Bad Blood." 
 
 
 
 WATCH: Taylor Swift Puts Her Entire Catalog Back on Streaming Services -- Right When Katy Perry's New Album Drops 
 
 During the "Roar" singer's live stream on Saturday, she shared that she doesn't "want to be held" to her feud with Swift anymore. 
 
 "God bless her on her journey," Perry stated. "I want to operate in a positive, kind space. I want to be an example of kindness, compassion, love, and I forgive and forget." 
 
 "That wasn't easy for me. I think everybody knows that wasn't easy for me. But it's fine," the singer confessed. "I want to let it go. I really want the best for every person." 
 
 Perry first opened up about her and Swift's rivalry during her appearance on James Corden's Carpool Karaoke. See more in the video below.
– Most people would prefer the matter of their therapy sessions stay private, but most people aren't Katy Perry. In an interview with Harper's Bazaar, picked up by Hollywood Life, the 29-year-old singer says she only survived her breakup with John Mayer thanks to her "oracle" of a therapist. "What I've learned is that if you don't have the foundation of self-love first, you really have nowhere to pull love from to give it away," she tells the mag. "I want to mommy everyone. I want to take care of them. I want to save them, and I forget myself in the meantime. I learned that through therapy." In case you weren't aware, John Mayer is one thing Perry has in common with her apparent "straight-up enemy" Taylor Swift—in fact, the bad blood between the singers started because of him, Page Six reports. Despite Swift's account that the feud with a certain unnamed female singer was business-related—TMZ reports that three dancers once left Swift, who apparently considered them "family," to return to Perry when she started touring again—a source tells Page Six that "Perry started making digs at Taylor" after Swift released the song "Dear John" about her breakup with Mayer following a brief affair in 2010. And so explains the Mean Girls reference.