Swift's rep, Tree Paine, tells PerezHilton.com:
Wow. Wow. Wow.
Kanye is straight-up INSANE!!!!!
It's as if Zoltar, the magical fortune teller machine, granted our secret wish we didn't even know we wanted granted!
The two hopped on a giant piano straight out of the movie Big, and gave a leg-splitting rendition of Chopsticks on The Jonathan Ross Show!
Ch-ch-check out Tom and Sandra defying some Gravity with their musical feet (ABOVE)!!!