Blake Shelton and his wife, Gwen Stefani, took the stage together at the CMA Summer Jam in Nashville, delivering an unforgettable duet of "Happy Anywhere." Their chemistry was undeniable, and Blake made sure to introduce Gwen with her new last name, "Gwen Stefani Shelton," much to her delight. Let’s watch the video to see their beautiful performance and their sweet moments together on stage…