Well, that didn't take long! Shortly after Miley Cyrus lashed out at Katy Perry and John Mayer, the 'Dark Horse' singer responded!

To recap: Katy told an Australian breakfast TV show that she pulled away from Miley's kiss because "God knows where that tongue has been."

Miley responded by tweeting she was glad Katy broke up with John, implying he gets around. Yiiiikes.