`Cheap Thrills` hitmaker Sia has decided to change her legal name and adopt the surname of her husband Dan Bernad.

According to court documents obtained by tmz.com, Sia wishes to change her name from "Sia Kate Furler" to "Sia Bernad", adopting the surname of her husband, Dan Bernad. The request comes as the couple are all set to celebrate their first wedding anniversary, marking a new chapter in Sia`s life, reports aceshowbiz.com.