Johnny Depp surprised fans by joining Alice Cooper's July 25 concert in London to perform Black Sabbath's hit "Paranoid" as a tribute to Ozzy Osbourne, who died three days prior at the age of 76.

"He was and will continue to be a rock n roll legend," Cooper said in a statement, hours after Osbourne died on Tuesday.

Fans at London’s O2 Arena got more than they bargained for when Johnny Depp made a surprise appearance during a high-voltage Ozzy Osbourne tribute.

Johnny Depp made a surprise appearance during Alice Cooper's latest sold-out gig in London, as he joined the rocker for a performance of Black Sabbath's 'Paranoid' during a tribute to Ozzy Osbourne.

Among the many stars publicly mourning Ozzy Osbourne is Johnny Depp. Together with Alice Cooper, he paid tribute to the Black Sabbath frontman on stage.

On Tuesday, a representative for the Osbourne family announced that the rock music icon had died at the age of 76. Following the sad news, Black Sabbath bassist Geezer Butler posted a photo of frontman Ozzy during his last-ever show at Villa Park in Birmingham,