Here’s what we know about the feud that inspired the Billboard No.
Well, at least they were friendly on social media.
“You’re as sweet as pie!

Let’s write a song together about the subject we know best … for my new record.
It’ll be brilliant,” Perry wrote to Swift onTwitterthat year.
The “All Too Well” singer didn’t take this news well, to say the least.

Then she realized, “Oh, we’re just straight-up enemies.”
Especially when someone tries to assassinate my character with little girls.
That’s so messed up!"

the “Dark Horse” singer toldNMEin 2017, reflecting on the overwhelming success of “Bad Blood.”
In an interesting twist, the two singers were dressed as fast food items.
Now, they’re back in each other’s good graces.
Swift even hand-embroidered a baby blanket for Perry’s daughter with Orlando Bloom.