The group's longest-tenured time keeper made what GNR called an "amicable exit" last week after 19 years.
Ozzy’s longtime collaborator and guitarist Zakk Wylde teased that the frontman could be airborne during the event.
The backlash stems from a photo shared by Launceston Mayor Matthew Garwood, who posed with Radke during the band’s current Australian tour.
The one-off affair takes place as part of November's KISS Army Storms Vegas event.
"This next one is one of my favorite songs that I didn't write," the singer told the crowd.
Isaac Carpenter used to be in a GNR cover band in high school.
What was new compared to last year's run of Dead Forever shows?
The Irish outfit debuted renditions of Bring Me the Horizon's "Can You Feel My Heart?" and Nirvana's 'Heart-Shaped Box" during their Like a Version appearance.
"The changing situation on the ground was too much,” Young explained.
You can check out any time you like... and then leave to go see Eagles at the Sphere.