The defiance inherent in this collection's title suggests that, after all these years, The Knack still have to prove themselves. Branded as Beatle rip-offs, sexist beasts, and one-hit wonders, it's a wonder the band had the will to plug its guitars in let alone continue releasing albums. As the title suggests, PROOF is a telling document. Normally, when taken out of context, nearly every overnight sensation sounds like a quaint time capsule reminder of an era gone by. Not so with The Knack. The band's brand of power pop has aged not a whit.