The metal legends were seen sidestage at the gig
"It's always been a bit of a struggle against the establishment"
It has seen performances from Black Sabbath, Thin Lizzy, Judas Priest and more
Judas Priest legend Rob Halford on the bands legacy, new album 'Invincible Shield' and being labelled 'Metal God by fans
"They've worked hard to get to this place of recognition"
"Just for the joy he’s given people over the years"
Parton most recently enlisted the Judas Priest frontman for 'Bygones' on her new album 'Rockstar'
The band secured a front row spot for the metal icons' set at the California festival
The first single from the new album will arrive soon
She's also shared a Heart cover recorded with Ann WIlson