Last year, fans began to suspect that the pair's relationship was looking up when Swift shared on Instagram a literal olive branch that Perry had sent her in advance of her Reputation tour and just last week, Swift sent Perry homemade cookies.
So what comes after baked goods when you're two of the most famous women in the world? A music video together, of course.
Overnight, Swift released the video for her new single 'You Need to Calm Down', which features a plethora of celebrity cameos - from Ryan Gosling (husband of Swift's good friend, Blake Lively) to Ellen De Generes, to Jonathan Van Ness and Ciara. But the most surprising guest of all came right at the end of the clip when Katy Perry emerged dressed as a burger (the very same costume she wore to the Met Gala after party last month).
To match Perry's outfit, Swift dressed as French fries and the two embrace before the video ends with a love heart circling their faces.
It looks like this Bad Blood is officially over.