Sia Performs 'Cheap Thrills' Live on 'American Idol' (Video)
The 40-year-old singer was a mentor to the contestants this week and the top four got to perform hits from her songbook during the show.
Sia didn’t reveal her face during the performance and kept her wig in front of her eyes as she sang. Watch the video below!
Sia Performs ‘Cheap Thrills’ Live on ‘American Idol’