No, you may not realize it when you see the pop star Sia in a restaurant, airport, or mall. That's because she often performs or walks the red carpet with her face hidden. Why does Sia do that?

The 40-year-old singer recently performed at the Apple ... rocks her statement red lipstick. It's possible Sia's desire to hide her face stems from more than just her fear of the dark side of ...

Hiding her face in interviews ... While her biggest hits have all come in the last two years, Sia has been in the music industry for more than a decade. Her experience, both as a solo artist ...