Phil Collen on Whether Mötley Crüe, Def Leppard Stadium Will Finally Happen in 2021: "I'd say it's 50/50" The Def Leppard guitarist weighed in on the reality of the rescheduled trek. Tags The Stadium Tour Read more about Phil Collen on Whether Mötley Crüe, Def Leppard Stadium Will Finally Happen in 2021: "I'd say it's 50/50"Log in to post comments