Mariah Carey is back to her old playful self after her New Year's Eve performance catastrophe. In a sneak peek of a new episode of 'Mariah's World,' Mariah Carey dresses up as her alter ego Bianca when her show team decides to dress up as Mariah. Dancer Bryan Tanaka, who seems to be infatuated with Mariah, commented on "Bianca's" booty saying, "Bianca's a** looks hella fierce."