As the rock world and fans alike mourn Ozzy Osbourne's death at age 76, some of his peers teamed up to pay 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.

Alice Cooper, in the middle of his sold-out performance, paused to honour his long-time friend and fellow rock legend Ozzy Osbourne, who had passed away just days earlier.