Another member of the Stefani-Shelton household made his debut at Blake Shelton's Oklahoma Ole Red Bar. On Monday night, Blake, who was performing onstage, surprised the crowd by inviting his 15-year-old stepson, Zuma to the stage. He walked out onstage in jeans and a cowboy hat, acoustic guitar in hand, and did a rendition of Zach Bryan's "Oklahoma Smokeshow." Throughout his performance, Blake adjusted the microphone and was giving Zuma a thumbs up from the side of the stage. Gwen's oldest son Kingston made his debut on that same stage last summer.