Sia Kate Isobelle Furler (born 18 December 1975), known as Sia, is an Australian singer, songwriter, record producer and video music director. She started her career as a singer in the local Adelaide acid jazz band Crisp in the mid-1990s. Since she has become known as the woman who hides her face. Aside from numerous #1 hits since her return in 2014, Sia has written huge pop songs for everyone from Katy Parry to Rihanna.