Sia is an Australian singer and songwriter. After starting her career in the 1990s with her own albums, she transitioned to writing songs for other artists. Her 2011 song "Titanium", written for Alicia Keys but featuring Sia's vocals, achieved commercial success. Her 2013 album "1000 Forms of Fear" was also successful. Sia's website and music videos feature her trademark blonde wig and focus on dance performances by Maddie Ziegler, representing Sia's distinctive artistic style that does not show her face.