Miley Cyrus locked lips with Katy Perry at her concert in Los Angeles on Saturday, February 22, 2014, after spotting the 29-year-old star singing along in the front row.
But I Kissed a Girl singer Katy, who is dating John Mayer, pulled away when Miley, 21, tried to stick her tongue in her mouth, according to gossip website TMZ.com.
The Dark Horse singer shared an aftermath photograph on Twitter, which features the Wrecking Ball singer with her mouth hanging open in shock and Katy covering her mouth with her hand, with the caption: "And after! I adore you @Miley Cyrus."
Miley hit back at critics earlier this week, who called for her raunchy tour to be cancelled and insisted she warned fans it would be X-rated.
She tweeted on Thursday, February 20: "You can't say I didn't warn you. Now sit back relax & enjoy the show. #bangerztour (sic)"
The tweet was accompanied by a picture of Miley on stage in a revealing outfit exposing her butt.
She also quipped: "Save your complaints for the McDonalds drive thru when they forget the 'fries with that' (sic)"
Nicole Richie and her husband Joel Madden, Max George, Kendall Jenner, and her older half-sisters, Kourtney and Khloe Kardashian, were also spotted at the gig on Saturday night.