Washington DC, July 27 -- Johnny Depp joined rock icon Alice Cooper on stage at London's O2 Arena to pay tribute to iconic singer Ozzy Osbourne, reported People.

John Michael "Ozzy" Osbourne, the lead singer of British heavy metal band Black Sabbath, passed away at 76. He breathed his last on July 22, Tuesday, after a year-long struggle with Parkinson's disease.

Cooper surprised the crowd at London's O2 Arena with a special appearance from Depp, 62, as the group performed Black Sabbath's 1970 hit 'Paranoid'

Depp, who is Cooper's Hollywood Vampires bandmate, walked on stage with a guitar in hand halfway through 'Paranoid', reported People.

Cooper, wearing an Osbourne T-shirt, later lifted his fist in the air when the song ended, as sho...