Swift's rep, Tree Paine, tells PerezHilton.com:
Wow. Wow. Wow.
Kanye is straight-up INSANE!!!!!
We love hearing No Doubt's new stuff, but it's great to hear one of our old favorites again.
Gwen Stefani reunited with her band and her bare midriff on the Jimmy Kimmel Live stage to perform their band's classic Hella Good and it's RAGING!!
We'll Rock Steady with these guys any day!!
P.S. How is it possible for that woman to be so svelte after TWO kids?!!
Ch-ch-check out the fiery live performance (above)!!!