Miley and Katy trade barbs over gig snog

Miley Cyrus has slammed Katy Perry on Twitter.

The pair locked lips when Miley performed in Los Angeles recently, but Katy said on Australian TV earlier this week she pulled away when 'Wrecking Ball' star tried to take it further, saying: "God knows where that tongue has been. We don't know! That tongue is so infamous!"