Justin Bieber loves a good surprise.
The singer made fans go wild in late July went he popped out on stage during a Selena Gomez show. Last night, the dreamy 17-year old made yet another cute concert cameo, shocking those in attendance at a Taylor Swift performance in Los Angeles.
Watch the crowd go bonkers below, as these two young icons break into a duet of Justin's "Baby."
"You think you've heard LOUD screaming in your life," Taylor Tweeted after the event. "Then [Justin Bieber] comes out and does a surprise song during your show. Woah. Unreal."
Responded the Biebs: "We should do that more often. :) great show! #muchlove."