Video: Watch Madonna's Billie Jean Tribute

As promised, Madonna paid her respects to the late Michael Jackson at her opening show at the O2 Arena in London on July 4th. Madonna was in the middle of singing her old hit “Holiday” when a Michael impersonator took center stage, looking just like the singer in his black sequined jacket and white glove.

After the quick segment to “Wanna Be Startin’ Something,”, Madonna told the crowd, "Let's give it up for one of the greatest artists the world has ever known.”

Check out the tribute below!