Naomi and Wynonna Judd’s blockbuster debut album overflowed with No. 1 hits and made the mother-daughter duo country queens. But for all the sharp songcraft and pop-wise production, it was their goose-bumps-inducing pairing of pipes that put the twosome over the top. Whether bearing down on the bluesy bends of “My Baby’s Gone” or daring you to keep your eyes dry on tear-jerking ballads (“Mr. Pain”), The Judds knew how to work their one-of-a-kind vocal blend for all it was worth.