He was fired from the band in 2004 but has since worked with Queens' frontman Josh Homme in Kyuss and recorded backing vocals on QOTSA's latest album �Like Clockwork. He also joined the band on stage at a gig in Portland in April this year.

But Oliveri says while he wouldn't rule out a permanent move, that decision isn't up to him. He tells NME: "That's pretty much up to Josh. It's his band. I put myself out there a few times in the past 10 years. I'd go and see them play and say, 'Hey man, I'm here! Do you want me to sing a song?'

"I stopped asking him after a while and then he asked me! It's pretty much just when he wants to do something these days. It's not up to me."