Australian singer/songwriter Sia is an inimitable presence on the pop scene with an unmistakable voice and a sound that has yielded scores of hits for both herself and a long list of collaborators. Through the course of her career, she swiftly rose from being a guest vocalist to a solo artist and accomplished hitmaker for the likes of Beyoncé, Celine Dion, Kanye West, Eminem, and countless others. On albums such as 2001's Healing Is Difficult and 2004's Colour the Small One -- which featured one of her definitive songs, "Breathe Me" -- she established herself on the indie scen...