Photos of Beyonce Knowles at Heathrow, JFK, Video of Her Duet with George Michael in London
Beyonce Leaves George Michael and London Behind

Beyonce Knowles beamed as she departed from Heathrow earlier today before popping up in a more casual outfit at JFK. She's been traveling around the UK for her tour, but she has a short break now before her next performance at Madison Square Garden on June 21. She ended her London run with a big surprise last night as George Michael joined her on stage for an "If I Were a Boy" duet. The crowd cheered wildly as the two pop icons belted out her song — check out the video below.

To see the video of Beyonce and George's duet just