At the end of her July 22 Mayhem Ball performance in San Francisco, Gaga exposed an Ozzy Osbourne T-shirt underneath a black leather jacket, then played his 1980 debut solo single “Crazy Train” as she and her dancers walked a catwalk.

Rock royalty is paying tribute to Ozzy Osbourne, who died today at 76.

The late legend is survived by his first wife, Thelma Riley and their children, Jessica, Lewis and adopted son Eliot. With Sharon, he shares kids Aimee, Jack and Kelly - the latter of whom the heavy metal pioneer got to see get engaged to Slipknot's Sid Wilson at Black Sabbath's goodbye show.