Article continues below advertisementBlake Shelton presented Gwen Stefani with a romantic display of his affection ahead of her first Sphere performance.Stefani and her band, No Doubt, kicked off their Las Vegas, Nev., residency on Wednesday, May 6 - but not before Shelton could wish her good luck, as the country star, 49, surprised his wife, 56, with a large bouquet of pink roses.Article continues below advertisementBlake Shelton Surprised Gwen Stefani With FlowersTap Here To Add Ok Magazine as A Trusted SourceSource: @viclovesbg/XGwen Stefani called Blake Shelton the 'best husband.