Katy Perry celebrated her 32nd birthday by watching Kanye West perform in Los Angeles. And while it might have cristina fox sex videobeen a wonderful night for her to party in the pit, it also was a great night for fans thirsting for some good ol' classic shade from the singer directed at a certain someone.

A video originally published on Perry's Instagram story shows her dancing while Kanye West barrels through the first verse of "Famous," aka that song about Taylor Swift.

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It's the verse heard around the world, with West's controversial lyrics that had Kim Kardashian recording phone conversations and Swift searching for statements on her iPhone.

In case you need a refresher on the tangled history between Swift and Perry, the feud between the singers began when dancers on Swift's tour left for Perry's tour in 2012. Since then the two stars, who seemed to be good friends, have subtly spat through subtweets and perfume names.

Looks like the bad blood is still lingering after all.