Rob Zombie's longtime guitarist John 5 will be stepping into Mars' shoes for the band's upcoming tours
The rapper-turned-rocker spurred controversy, though, for posting a video of himself snorting an unidentified substance off Fox’s chest
The band's long-serving guitarist has suffered from Ankylosing Spondylitis since childhood
Def Leppard say they're "beyond thrilled" to be kicking off the run in Sheffield, "where it all started for us 45 years ago"
It comes after the drummer previously announced he was joining the service at a concert in Las Vegas earlier this month
The former Ozzy Osbourne bassist wasn't impressed by the band's recent gig in Vegas
"The world is too soft! Been doing this shit for years"
"We're far from being over", the frontman said of the band's recently finalised Stadium Tour
He made the announcement at a Las Vegas gig on Friday
"I got fucking sideways as fuck and got naked and posted pictures of my dick"