An eyewitness tells ET that Gwen Stefani surprised her husband, Blake Shelton, at the wrap party for season 23 of ‘The Voice’ on Tuesday. ET’s eyewitness explains that the singer wasn’t able to be at the live taping due to a prior commitment out of town, but she came back just in time to celebrate with him after the show. On Monday, Gwen delivered another surprise for the country singer, when she treated him to an intimate dinner party in Los Angeles to commemorate his final season on the hit NBC show.