Sia Kate Isobelle Furler, sometimes referred to mononymously as Sia, is an Australian singer and songwriter. Sia's music incorporates hip hop, funk and soul as a base for her vocal styling. When it comes to her hit songs, Sia feels that the visuals have artistic merit while the music is more commercial. She states that she is intrigued by how songs become hits and a little perplexed at why she's so good at creating them. Sia's image notably rests on a blonde bob wig, a simple piece of branding that allows her to performances with her back turned to the audience. Many of Sia's popular songs are based around a single metaphor; examples include David Guetta's "Titanium," Rihanna's "Diamonds," Britney Spears', "Perfume" and her own track "Hostage."