India, July 28 -- Actor Johnny Depp joined rock legend Alice Cooper on stage to pay tribute to late Ozzy Osbourne during a concert at London's O2 Arena on Friday. Alice, 77, paused his set to honor the legendary Black Sabbath frontman, who died on July 22 after years of health battles including a Parkinson's diagnosis. "Even though everybody saw it coming with Ozzy, it just took our breath away when it happened," DailyMail quoted Alice as saying. The crowd was left surprised when Johnny, 62, walked on stage mid-performance, with guitar in hand. The actor, who is a longtime friend and bandmate of Alice in Hollywood Vampires group, later performed Black Sabbath's classic Paranoid. Wearing an Ozzy T-shirt, Alice said the song was a tribute to the late musician. The tribute concluded with the rock singer raising his fist to the sky. The night was symbolic since Alice was also celebrating the release of The Revenge of Alice Cooper, his first album with the original Alice Cooper band since 1973's Muscle of Love. After the Ozzy tribute, Johnny performed the classic School's Out with the original band members Dennis Dunaway, Neal Smith, and Michael Bruce. HTC...