"But when you've got a singer that is so eaten up with jealousy for the headliner, it never goes well"
"I can’t sing if you’re gonna smoke, all right?"
The surprise, last minute gigs took place over the weekend in LA
"A hundred bucks, maybe"
"That activity that a very, very small minority of people do is so selfish and so disturbing"
He also spoke out against plans to build The Sphere in London, calling it "a waste of time, waste of money"
Queens Of The Stone Age, Royal Blood, Megadeth and many more are also set to perform at the massive rock and metal festival
The film was written by his son, Austin
His album ‘The Mandrake Project’ will be his first solo album since 2005
His first solo album in nearly two decades will come out next year