Australian singer and songwriter. Born and raised in Adelaide, she started her career as a singer in the acid jazz band Crisp in the mid-1990s. When Crisp disbanded in 1997, she released her debut studio album, OnlySee, in Australia. She moved to London and provided vocals for the British duo Zero 7. Sia released her second studio album, Healing Is Difficult, in 2001, and her third, Colour the Small One, in 2004.