Taylor Swift, Katy Perry

Gustavo Caballero/Pascal Le Segretain/Getty Images

Guess that bad blood isn't going to go away anytime soon.

The notorious feud between singers Katy Perry and Taylor Swift was refueled last night when Katy shared a video that got fans buzzing. The birthday girl, who rang in the big 3-2 yesterday, ended her celebratory day with the Kanye West concert in Los Angeles, and we're not sure if you're aware, but Yeezy has one song in particular that revolves around a one Taylor Swift.

Oh, OK, cool. You've heard of it.

Now, sure, that beat is catchy, and it's already gained enough traction that you'd find yourself swaying to the beat regardless of any personal feelings you have towards the song. But given the history between Perry and Swift, it was especially interesting to watch her dance along to that particular lyric.

A video from Katy's Instagram story, which was graciously shared on Twitter by a fan, shows the singer dancing to 'Ye rapping and then opening her eyes wide and getting up close to the camera when he yells, "I feel like me and Taylor might still have sex, why? I made that bitch famous!"

Oh, the subtle shade.

After giving the internet something to talk about, Katy went on to enjoying the show with a hot dog, some dancing with Halsey and even got courageous and went into the pit.

Perry began her special day with a massage and some bacon cake for breakfast, followed by putting in her early vote for Hillary Clinton and receiving a "fuzzy vagina" as a gift from her Goddess Box. Yep, you read that right.

As for her tumultuous relationship with frenemy Swift, the two seem to still be on the outs for reasons that continue to be somewhat of a mystery.

Perry and T. Swift have been in an alleged feud for a couple of years now since Perry allegedly tried to "sabotage" the "Style" songstress' tour by taking some of her backup dancers. But, Perry dropped somewhat of a bombshell in September when she tweeted back to a fan saying she'd collab with Swift if she apologizes. BUT FOR WHAT?!

And it doesn't seem like that apology has been made. The two stars found themselves in closed quarters over the weekend, when they both attended Drake's birthday party at Delilah's in Los Angeles.

We're told the two didn't interact at all. And to make things even more interesting, their ex-boyfriend John Mayer (yes, he dated both of them) was also there. A source told E! News Katy and John mingled and were friendly, but Taylor didn't talk to either of them.

We guess subtle shade will continue to be their preferred communication.

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