6 Secretive Sia Moments: Masked But Far From Anonymous | Billboard 

For as much visual mystique as she courts, it's not as if we haven't seen Sia's face before. It's on her earliest album covers; she used to perform live sans mask; she's even brought her unshrouded face to a red carpet or two.

But over the years, she's gone out of her way to avoid associating her face with her voice and talent. She's not completely shying away from the spotlight, just attempting to blend into the background and let others share in the benefits of her success. It's as if Sia is a permanent fixture on a blind round of

In addition to penning her own hits like "Chandelier" and "Elastic Heart," she's written for some of the biggest names in music -- including Beyonce's "Pretty Hurts," Christina Aguilera's "You Lost Me" and Rihanna's "Diamonds."

titled "My Anti-Fame Manifesto." It opened with, "If anyone besides famous people knew what it was like to be a famous person, they would never want to be famous."

Sia may not seek out fame directly, but her anonymity has only piqued our curiosity further. These days, her range of disguises have taken center stage -- possibly generating as much discussion as her music.

Here's a collection of videos showcasing a talent that shines through any attempts to mask it.

Sia performs her first Billboard Hot 100 chart No. 1 (as an artist) and spent four weeks in the No. 1 spot.

Ellen assured her audience, "Believe me, this is her singing live," and following the performance everyone hugs facing the corner.

Sia joins forces with Maddie Ziegler and another non-Shia LaBeouf dancer to bring "Elastic Heart" to life on the

File Donald Trump as host and Sia as musical guest under "usual pairings." Sia gives an emotional performance of the song originally intended for Adele.

With her back to the crowd in Hollywood, Sia performs the song she gifted to Rihanna, who would make it shine bright at No. 1 on the Billboard Hot 100 chart. 

Backed by a choir, Sia belts out yet another song intended for Adele and we couldn't feel more "Alive."