She was discovered by an Italian DJ while singing karaoke in a bar. She also briefly attended the University of Adelaide.
She won three ARIA Awards in 2010, including Best Independent Release, Best Pop Release, and Best Video.
Her full name is Sia Kate Isobelle Furler. She was married to Erik Lang from 2014 to 2016. She is the cousin of musician Peter Furler. In 2019, she adopted two teenage sons. She became a grandmother in 2020. She married Dan Bernard in May 2023.