A new sneak peek at Mariah Carey's upcoming E! docuseries, Mariah's World, is here, and it does not disappoint. In the newly released trailer, cameras follow the star into her private life, giving viewers an exclusive look at Mariah as she prepares for her Sweet Sweet Fantasy world tour and plans her wedding to fiancé James Packer. In true Mariah fashion, the singer talks to the camera while sprawled out on a couch wearing a sexy corset. The clip also gives fans an adorable glimpse into her life as a mum to 5-year-old twins Monroe and Moroccan.