It's all about the band
Vivian Campbell isn't an original member of Def Leppard. He wasn't in the Brit band when Def Leppard recorded its signature songs in the studio with producer Robert John "Mutt" Lange.
He missed that first huge wave of popularity in the '80s, when Def Leppard dominated TV and radio with hits such as "Photograph," "Foolin'," "Rock of Ages" and "Pour Some Sugar on Me."
Campbell isn't defensive about it - on the contrary.