Sia’s "Chandelier" video has racked in over a billion views, and to many of those viewers, the song may as well have been her debut (it was off her sixth record). 1000 Forms of Fear, the singer's 2014 album, was very much a rebirth, one that propelled the secretive singer from addiction and depression and into pure pop stardom. For Sia's "Nostalgic for the Present" tour, her first in five years, she's bringing along Miguel and AlunaGeorge.
