Feb 27, 2016 at 5:52 pm

Lady Gaga Performs with Elton John at Surprise Concert (Video)

Lady Gaga joins Elton John on stage at his surprise concert on the Sunset Strip on Saturday afternoon (February 27) in West Hollywood, Calif.

The event was held as a thank you to the city of West Hollywood for their support of the Elton John AIDS Foundation and it was streamed live on AOL.com.

Gaga surprised the crowd during the pop-up show to sing a duet of “Don’t Let the Sun Go Down on Me” with Elton.

“Gave it for this wonderful man who has inspired people for generations,” Gaga said after the performance. “Wonderful Crazy Night is a beautiful record and thank you so much for the Elton John AIDS Foundation. We all appreciate it so much.”