Blake Shelton gives ET’s Cassie DiLaura an all-access pass to his new residency, ‘Blake Shelton: Live In Las Vegas’ at The Colosseum at Caesars Palace. He’s currently playing through the end of January, then returns for more shows in May, all as he celebrates the success of his 31st No. 1 radio single, ‘Stay Country or Die Tryin’.’ The country superstar reflects on returning to Sin City, where his wife, Gwen Stefani, is also launching a residency with her band, No Doubt, at the Sphere. Blake weighs in on whether they could ever team up for a crossover stage show, and shares how he and Gwen are nurturing son Zuma Rossdale’s own music biz aspirations.