Lzzy Hale, whose band Halestorm was one of the groups chosen as a supporting act for the July 5 show, in Birmingham, England, tells PEOPLE in this week’s issue that her memories of Osborne — who died on July 22 at age 76, just two weeks after the show — will forever remind her of the power of music.

Osbourne preceded the Black Sabbath performance at Back to the Beginning with a set featuring members of his past solo bands. He played "I Don’t Know," "Mr. Crowley," "Suicide Solution," "Mama, I’m Coming Home" and "Crazy Train."