Swift's rep, Tree Paine, tells PerezHilton.com:
Wow. Wow. Wow.
Kanye is straight-up INSANE!!!!!
Oh, bless her irreplaceable little heart!
Well, the sneaky Queen Bey is at it again!
This time one of her fans was FaceTiming with a friend during the concert and the Love On Top singer surprised everyone by taking the phone and saying hello!
ZOMG! We cannot imagine how excited the person was on the other end!!