"The farewell tour is next," says Lee. "This will be it. Our guitar player [Mars] has a spinal disease that's slowly fusing his vertebrae together. It's one of those things that's treatable, but not curable. So it's just progressively getting really worse and it's painful for him, so he doesn't wanna tour much longer. I can't say I blame him."

When Deadmau5 asks if the Crue would bring in another guitarist to substitute for Mars, Lee says, "The last thing we ever wanna do is go out running on two cylinders with some hired guy playing guitar; that's just whack.