In a bittersweet send-off, Ozzy Osbourne and Black Sabbath's farewell concert brought together rock legends and raised a stunning amount for charities.

In the wake of his death, Ozzy Osbourne’s Black Sabbath bandmate is shedding light on the quiet struggle behind the rock group’s final show. Tony Iommi, Black Sabbath guitarist and co-founder, told UK broadcaster ITV that Osbourne was “frustrated” during the band’s farewell concert on July 5.