Many people are curious why Sia wears the half black half platinum wig and the 'Chandelier' singer gives an in-depth explanation on keeping her face a mystery. "I don't wear this unless there are cameras around. I only wear this to try to maintain a modicum of privacy," she opened up to James Corden on The Late Late Show during the Carpool Karaoke segment. "I was a singer for 10 or 11 years to mediocre success. I was an alcoholic and a drug addict, and I sobered up and I decided I didn\u2019t want to be an artist anymore because I was starting to get a little bit famous and it was destabilizing in some way," Sia revealed. "I thought, \u2018What doesn\u2019t exist in pop music at the moment?\u2019 And it was mystery! I was like, 'There\u2019s pictures on Instagram of everyone at the dentist.'" Even though her face is not a mystery you can find numerous pictures of Sia online attending events.