Taylor Swift + Justin Bieber = OMG X 15,000

"You think you've heard LOUD screaming in your life. Then @justinbieber comes out and does a surprise song during your show. Woah. Unreal," Tweeted Taylor after this performance. 

This is some kind of awesome.  Even if you don't like Taylor or Justin, I don't understand how you can hate on something that inspires this level positivity and enthusiasm. 

Watching this video, I can't help can't but smile.