The 41-year-old pop star has made it a point not to show her face while onstage, citing that it helps with her stage fright.
Last August, Sia's frequent tour mate, Maddie Ziegler, told The Insider
that she's often asked what the singer looks like when the wig is off
. "A beautiful, loving, caring face," Ziegler described. "People are always like, 'Is she pretty? Is she ugly?' I'm like, 'She's gorgeous and it's not just on the outside, but on the inside too.'"