On the first night of her San Francisco tour stop at Chase Center, Lady Gaga honored the late Black Sabbath singer and thanked the city for its care of her longtime collaborator Tony Bennett.

Both aesthetically - and occasionally musically - the show cribbed from the heavy metal heyday of the 1980s. So it was only right that Gaga honored one of the genre's founders, Ozzy Osbourne, who died earlier that day.

Lady Gaga paid tribute to the late Ozzy Osbourne at her show hours after his death. During the San Francisco stop of her “The Mayhem Ball” tour on Tuesday, July 22, Mother Monster, 39, donned an Ozzy Osbourne top during her final song “How Bad Do U Want Me.