Katy Perry kissed a Girl And She Liked It... the Girl? It's Miley Cyrus!!!

Over the weekend at Miley Cyrus' LA show she shocked fans when she walked into the crowd and planted a kiss on Katy Perry's lips while performing "Adore You!".
Earlier, Katy had tweeted, 
“I hope @MileyCyrus sings Breakout or The Climb tonight please bb!”