What a line-up!
In the video, Courteney is sat at a piano, flanked by Ed Sheeran and Sir Elton John.
Ed started the video by saying "Lisa Kudrow, this is for you", before Courteney started smoothly playing 'Tiny Dancer' on the keys with Ed and Elton singing along.
Fans and celebs alike were stunned by the surprise performance with David Beckham writing, "Oh wow now that's a line-up." and chef Jamie Oliver added, "Haha amazing, go Courteney no pressure, brilliant."
Fans will remember back in season three of Friends, Phoebe says she thinks the most romantic song of all time is "the one that Elton John wrote for that guy on Who's The Boss? 'Hold me close, young Tony Danza'".
Lisa reacted to the video not long after it was posted.