Chief Keef doesn't take any kind of criticism towards his music lightly.

The Chicago rapper has a song called 'Hate Bein' Sober,' off his debut album, 'Finally Rich,' and pop star Katy Perry isn't fond of it. She heard the track and decided to share her sentiments on Twitter Tuesday (May 21).

"Just heard a new song on the radio called "I hate being sober" I now have serious doubt about the world," Perry wrote.

Keef felt this was a low blow, which shows in the bottom-of-the-barrel insults he slung at Perry through tweets.

"Dat bitch Katy Perry Can Suck Skin Off Of my D---," he wrote earlier this afternoon. "Ill Smack The S--- out her."

He even revealed that a diss track would be on the way. "New Song Katy Perry Coming Soon," the rhymer posted.

Stay tuned for a song that's sure to be full of explicit content.