Swift's rep, Tree Paine, tells PerezHilton.com:
Wow. Wow. Wow.
Kanye is straight-up INSANE!!!!!
Yassssss! We can't get enough of Brian Williams rapping!
Jimmy Fallon has struck comedy gold here, and we hope he never stops tapping that well!
Ch-ch-check out the video (above) to see the straight-faced NBC newsman in a one-of-a-kind performance of Snoop's Gin And Juice!