Blake Shelton already had a very successful music career before he joined The Voice in 2011, but his future girlfriend Gwen Stefani had no clue who he was.

She made the confession during a recent interview with Andy Cohen. Gwen also admitted that it took awhile to get used to their differences. "It's crazy. I mean, now it's normal," she says. "I've accepted that he's a true hillbilly and all those things."