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Miley Cyrus is firing back at Katy Perry after Perry joked about the singer’s ubiquitous tongue during a radio interview.

Last week when Perry was asked about Cyrus kissing her at her BANGERZ concert, she said, “I walked away. I was like, that tongue is infamous. I don’t know where it’s been.”

Miley didn't like the denial and started taking shots at lady Katy's ex John Mayer.

Check out the tweet.

Whoa.

Cyrus then added in a more playful tone:

Perry and Mayer just broke up last week.

What do you think of Cyrus’ response to Perry?