Johnny Depp paid tribute to Ozzy Osbourne with a special concert appearance three days after the heavy metal icon's death at age 76 on Tuesday, July 22. Depp, 62, walked on stage during rock legend Alice Cooper's show at The O2 Arena in London on Friday, July 25, to perform the classic Black Sabbath track "Paranoid," according to YouTube footage of the event. (Osbourne was Black Sabbath's frontman between 1968 and 1979, and most recently reunited with the original lineup for his final concert in Birmingham on July 5.