© @Copyright HELLO! Hello! Magazine Gwen Stefani looked sensational as she performed her new single, Let Me Reintroduce Myself, at the Global Citizen Prize ceremony. READ: Is this Gwen Stefani and Blake Shelton's wedding location? Take a lookThe No Doubt star, 51, took to Instagram to repost a photo taken by her stylist Rob Zangardi, which saw her posing in a lift wearing a daring sparkly co-ord that is perfect for the festive season.