Although they made great records together in the early '80s, Def Leppard guitarist Vivian Campbell and the late Ronnie James Dio clearly didn't see eye-to-eye.

A few years prior to his death Dio made his feelings on Campbell crystal clear, declaring "he's a f---ing a--hole.... he's a piece of s---." Although he said he regrets referring to Dio as "one of the vilest people in the industry," Campbell maintains it was he who was wronged by the legendary singer: “I didn’t quit that band. They quit me. I’m proud of those records and for years and years, Ronnie excluded me from that.” He recently reunited the original Dio band with a new singer, promising, "I wrote those riffs. I'm going to take them back."