The singer and songwriter - Sia, received an extensive admiration for her performance in the reality television, music competition - X Factor, as she took the X Factor stage with her new hit song Alive - off her forthcoming seventh studio album - This Is Acting.

The 39 year old Australian singer was spotted floating down in a dramatic wig and giant bow, before Sia landed on an extremely large glass cage with a half-naked dancer in a leotard inside.

The "Chandelier' singer was pitch-perfect throughout her performance, while she (who began singing in the local Adelaide acid jazz band Crisp) performed to a standing ovation from the audience.

As she took inspiration from her first Chandelier music video with the American child dancer, actress and model - Maddie Ziegler, the singer's back up dancer gave a jaw-dropping performance all throughout.

A Twitter user posted, "Best thing about X Factor #Sia #XFactor love her!!!" While another Twitter user added, "Sia is actually amazing on X-Factor."

However, the mysterious singer is famous for preserving her privacy by concealing most of her face behind different kinds of wigs, and she has a very practical explanation for her choice.

Sia talked about the decision while having a good conversation with her friend Ellen DeGeneres (American comedian, television host and actress) on her daytime talk show, and she made it clear that she doesn't want individuals taking pictures of her when she's out and about.

Stating, "Well, it's just for the reason that I can go to Target and purchase a hose if I want to. Or if I find I'm in need of a restroom, I can go on the side of the road with no person would be following me with a camera trying to get a shot."

In addition, Ellen DeGeneres has seen Sia's face in private, and Ellen tried to persuade Sia into removing the wig and showing others the beauty of the face hiding behind it.