The day-long concert special featured standout performances from Osbourne and Black Sabbath, Metallica, Guns n' Roses, Jack Black and more.

Let the madness begin!” bellowed a mischievous Ozzy Osbourne from his bat-and-skull encrusted throne in front of a sold-out Villa Park in Birmingham, England. The Prince of Darkness had finally taken to the stage after a marathon of legendary metal bands paid homage to his life and work throughout the day for his and Black Sabbath’s Back to the Beginning concert on Saturday,

Ozzy Osbourne may have given his final performance, but he hasn’t yet given fans his final writings — or “Last Rites,” as he punningly puts it. His new memoir of that name will come out this fall, Hachette Book Group announced Thursday.