Sia’s Strange Saturday Night Live Promo with Kevin Hart

7 Songs you didn’t know Sia wrote►► More Celebrity News ►► The Sia conundrum still remains, guys: Who is the mystery woman with the voice of an angel?! Hey guys, welcome back to Clevver news. So as we all have learned from performance after performance of “Chandelier”, whenever Sia performs, she chooses to keep her identity secret so we can focus on her voice and the visual creation… usually featuring the her muse of a music video dancer, Maddie Ziegler.