There's no way the real KP would ever be sweet to T-Swizz!

Katy Perry's Twitter account was hacked yesterday, and the perpetrator sent a message to her rival Taylor Swift! "Miss u baby @taylorswift13," they tweeted at the "Bad Blood" songstress. The hacker also leaked an unreleased song titled "Witness 3.1," and insinuated it was from the "Roar" singer's archive.

Almost as soon as they mischief began, Soundcloud and Twitter blocked the activity, but not before fans took a trusty screenshot!

Katy and Tay have hated each other for years, and it began in 2014 when the blonde beauty hinted at a fellow pop star mean girl in an interview with Rolling Stone. "For years, I was never sure if we were friends or not. She would come up to me at awards shows and say something and walk away, and I would think, 'Are we friends, or did she just give me the harshest insult of my life?'," she told the mag.

We're surprised the hacker didn't tweet at John Mayer while they were at it!