They both kissed girls, and they liked it!
The lip-lock happened during Miley's performance of her ballad, "Adore You."
"I just kissed a girl and I really liked it a lot!" Miley exclaimed as she hopped back up onto the stage.
Katy, 29, later shared a photo of her post-kiss reaction on Twitter, where the "Dark Horse" singer is seen covering her mouth, while Miley looks hilariously shocked.
"And after! I adore you @MileyCyrus," Katy wrote, along with the photo.
And after! I adore you @MileyCyrus 👅 pic.twitter.com/xGU0UPna1S
-- Katy Perry (@katyperry)
Katy is a longtime fan of the 21-year-old star, and Tweeted a song request to Miley ahead of the Los Angeles concert.
Read it more from the source: Yahoo