Sia Kate Isobelle Furler (born 18 December 1975) is an Australian singer, songwriter, record producer and music video director. She started her career as a singer in the acid jazz band Crisp in the mid-1990s in Adelaide. In 1997, when Crisp disbanded, she released her debut studio album titled OnlySee in Australia, but it did not sell well. She moved to London, England, and provided lead vocals for the British duo Zero 7.