Сиа is an Australian singer-songwriter known for her distinctive voice and emotive performances. She gained international fame with hits like "Chandelier" and "Elastic Heart." Sia often uses her music to explore themes of identity, resilience, and personal struggles. In addition to her solo career, Sia has written songs for other artists, including Rihanna and Beyoncé. She is also recognized for her unique visual style, often performing with her face obscured by wigs or masks, which adds an element of mystery to her public persona.