Taylor Swift kicked off her four nights of concerts in Los Angeles in a big way.
Last night was Taylor's first of four shows at the Staples Center in Los Angeles and fans were treated to a special performance by none other than Justin Bieber!
During her set, Taylor asked the audience if it was ok if she brought out "her friend Justin" and the crowd went wild. Then Bieber ran onto the stage and the two started singing his hit song "Baby."
After the show, Taylor took to her twitter to say, "Dear amazing LA crowd tonight, God only knows what I'd be without you.
"You think you've heard LOUD screaming in your life... Then Justin Bieber comes out and does a surprise song during your show. Woah. Unreal."
Bieber adds, "We should do that more often... great show! Much love."
Take a look at the surprise performance below. This is only Taylor's first night in LA, so we can't wait to see if she pulls out any more surprises throughout the week.
(Photo: Getty Images)