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Shots fired!
We had a feeling things would get awkward when Katy Perry, 32, and Taylor Swift, 26, were BOTH in attendance for Drake's 30th birthday bash — and a new report claims that the "Firework" songstress did in fact diss her enemy.
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"Taylor walked by Katy and Katy’s people laughed at Taylor, but she brushed them off and walked away,” a source told Hollywood Life.

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Katy and Taylor have a long-standing history of feuding over the years, since the country-turned-pop songstress seemingly took jabs at Katy in an interview back in 2014.
“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,” Taylor said at the time.
Katy — who also dated John Mayer after Taylor did — replied to this jab with a tweet, reading, "Watch out for the Regina George in sheep's clothing."