Photo Credit: Landov Media

Earlier this week, Katy Perry made a comment about Miley Cyrus and her dirty tongue...

The 'I Kissed A Girl' singer felt Miley coming on strong during their lip lock at the Bangerz Tour stop in Vegas.

While it LOOKED like Katy kissed a girl and liked it… That wasn't really the case…

She stated:

...that's when I walked away. I was like, "that tongue is infamous." I don't know where it's been. You slide down it every night. I was just going in for a "hey, girlfriend" kiss.

It did NOT go over too well with Miley:

Ouch. Major burn. And, John Mayer got caught in the crossfire. 

We're hoping this cat fight ends with an awesome make up sesh.