It was inevitable that Sia's unique vocal talent would find a significant audience outside her native Australia. In 2000 her debut album, Healing Is Difficult, was championed by critics -- the lead single, "Taken For Granted," even made the U.K. Top 10 -- but sales were relatively poor. The record did, however, bring Sia to the attention of London studio assistants Henry Bins and Sam Hardaker, who invited her to record vocals for two tracks on a CD they were making in their s...  [+]