Our fave stars are up on stage all the time, but that also means there's a lot of room for surprises. Whether it's Harry Styles getting his pants yanked off by his sneaky One Direction bandmate or Miley Cyrus kissing her friends, no one could expect these crazy moments to actually happen!
Click through the gallery of shocking stage moments and let us know which one surprised you the most in the comments below!
Miley Cyrus shocked everyone in her audience when she sat down on the edge of the stage and got a kiss from Katy Perry, who — despite singing a song called "I Kissed A Girl" — looked equally surprised that it actually happened!
And after! I adore you @MileyCyrus 👅 pic.twitter.com/xGU0UPna1S— Katy Perry (@katyperry) February 23, 2014
And after! I adore you @MileyCyrus 👅 pic.twitter.com/xGU0UPna1S