Inevitably, and rightfully, at their more-or-less co-headline concert at a busy O2 Arena, both Judas Priest and Alice Cooper found ways to memorialise their late comrade in metal, the pioneer Ozzy Osbourne,

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 paid tribute to Ozzy Osbourne during his latest performance in London, with a little help from Johnny Depp. Cooper surprised the crowd at London's O2 Arena with a special appearance from Depp,