Twitter jumped on pop superstar Sia after she made a controversial casting choice for her new movie - and since its release, the reviews have been even worse ...

Out of all the celebrities out there, Sia was seen as one of the nicest.

via: Getty

The Australian-born singer is constantly in and out of the headlines with heartwarming stories of her generosity, but her latest move may have just got her into some hot water...

Now, Sia is first and foremost known for her singing abilities.

The singer-songwriter has made waves on the music scene with her soulful and meaningful music and song lyrics and has become popular for her somewhat eccentric style.

She's achieved incredible success in recent years.

“Chandelier," “Elastic Heart," “Cheap Thrills"… Just to name a few.

And, putting her musical talent to one side, Sia is known for standing out from the crowd.

The singer isn’t your typical musician - she very rarely shows her face and always covers herself up in an attempt to shy away from the typical celebrity lifestyle.

She has been quite creative with her methods of concealment.

During performances and public appearances, Sia has been known to hide her face with huge bows, wigs, and all manner of headgear.

Often, her audience can't even see her.

For the last few years, the musician has used stage performers and dancers, such as Maddie Ziegler, to represent her and take most of the spotlight.

But Sia has been open about these fame anxieties...

And she has been praised for allowing the world to see her true self.

Famously, the singer has endured a long battle with alcohol and drug abuse.

The Australian native has, with very little filter, discussed her struggles and anxieties when it comes to dealing with fame, and how she depended on substance abuse to cope for many years.

She even credits her alcoholism for her trademark face-blocking wig.

“I was an alcoholic and a drug addict, and I sobered up and decided I didn't want to be an artist anymore because I was starting to get a little bit famous, and it was destabilizing in some way," she told James Corden in 2016, when discussing her wigs.

But people love her for her honesty.

Sia hasn’t been afraid of opening up about her feelings towards fame and attention from fans. “If anyone besides famous people knew what it was like to be a famous person, they would never want to be famous," she once wrote in Billboard in 2013.

She is just so relatable.

Unlike many celebrities these days, Sia is refreshingly normal, which is one of the many reasons people love her so much.

She's even admitted to using dating apps such as Tinder and Bumble.

Though she doesn’t use her real name, she does post real photos of herself on the apps - she admitted that most people don’t realize that she’s the famous singer, and she just tells them that she’s a writer.

And, of course, the singer is insanely generous.

Just last year, Sia was spotted in a Walmart offering to pay for the groceries of every single shopper.

Footage of the singer's heartwarming act quickly spread across social media...

And she could be seen paying for hauls of shopping, hugging grateful customers, and introducing herself as "CiCi."

People were in awe at Sia's kindness...

But her latest move has got her into a spot of bother with more than just her own fans.

Sia has made a movie about a young girl with autism.

via: Getty Images

But her casting choice of Maddy Ziegler, an actress without autism, didn't sit right with some.

The movie was released last month.


And let's just say, things have not got any better for Sia as the negative reviews continue to roll in.

Keep scrolling for the trailer...

Watch the trailer below.

What do you think?