We thought the "bad blood" between Katy Perry and Taylor Swift was coming to an end when the two pop stars were spotted at Drake's birthday party with no drama reported by the end of the evening.
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But to celebrate her own birthday, Katy went to Kanye West's Saint Pablo tour in Los Angeles! She was even spotted partying it up with Halsey at the pit with other concert-goers.
During the "E.T." rapper's performance of "Famous", Katy filmed an Instagram story of herself jamming to the controversial lyrics which reignited his own feud with Taylor!
Back in September, Katy revealed in a Twitter Q&A that she would do a collaboration with Taylor if the latter apologized to her.
Are you #TeamKaty or #TeamTaylor? Tell us in the comments!