Swift's rep, Tree Paine, tells PerezHilton.com:
Wow. Wow. Wow.
Kanye is straight-up INSANE!!!!!
Ariana Grande is out there getting her hustle on!
A day after she surprised Arianators with VIP passes to her Today Show performance, the tiny songstress rocked the stage with all three of her hit singles!
This was much better than her stint on America's Got Talent!