Blake Shelton is incredibly devoted to winning! The 45-year-old country star joked about his passion for the NBC music competition show on Wednesday's when discussing his summer wedding to Gwen Stefani. «Gwen and I, we agree that if we're going to pull off the ultimate publicity stunt, which is what this relationship is, then we wanted to follow through, man, and go ahead and get married,» Shelton quipped.