Australian singer-songwriter Sia was a part of acid jazz band Crisp and British duo Zero 7, though she's best known for her solo work in the pop world later on in her career. After acting as a writer for Beyoncé, Kylie Minogue, Flo Rida, and Rihanna, Sia went back to releasing her own music with a splashy number one debut with 1000 Forms of Fear. The track was eventually certified gold by the RIAA. Sia has since doubled down on her mainstream success through key festival performances, stadium-friendly songwriting, high-profile collaborations, and an instantly recognizable visual aesthetic to match.