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Watch Katy Perry Sing & Dance to ‘Bad Blood’ at Taylor Swift’s Sydney Eras Tour Concert

Katy Perry sings Taylor Swift's "Bad Blood" at an Eras Tour show in Sydney, Australia. Watch.

In fan-captured videos, the “Dark Horse” singer is spotted singing along and dancing at Accor Stadium to the pop superstar’s hit “Bad Blood.” Swift has never confirmed that the hit was about the two pop stars’ dispute, but hinted at it during a 2014 Rolling Stone interview, when she said an unnamed female artist poached one of her backup dancers. Proving that point, the American Idol judge — who recently announced that this 22nd season and her seventh will be her last on the singing competition — shared a selfie with Swift on Instagram after the concert and captioned the post, “Got to see an old fried shine tonight.” In the carousel post, Perry also included a selfie video of herself with Ora singing along to “You Belong With Me,” a clip of Swift performing “Bad Blood,” a photo with one of her own fans and more.

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