But wait! The source dished much, much more:
[Image via Splash News.]
A man who needs no introduction… but we’ll give him one anyway.
We love that he chose two upbeat songs to play, unlike the usual softer second song artists opt for. And we especially like it since Don't is about Ellie Goulding, according to rumors.
And you already know Taylor Swift was backstage cheering on her bestie!
Ch-ch-check out the flawless performances (below)!