Blake Shelton is saying goodbye to after 23 seasons — but he couldn't be more thrilled about his replacement!NBC announced on Monday that country music legend Reba McEntire will officially be stepping in for the departing coach in the next season of the long-running singing competition, set to premiere this fall.Reba will draw from her iconic career as she shares her expertise with hopeful up-and-comers, joining veteran coach John Legend and returning coaches Niall Horan and Gwen Stefani.When ET's Cassie DiLaura spoke with Blake ahead of live semifinals on Monday, he shared how excited he was to have Reba taking over his coveted spinning chair."[There's] no one better than Reba, honestly," he raved. «To be honest, and I don't mean this as a dig to anybody, I'm shocked that they got her.