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Sia once again defended her decision to cast former Dance Moms star Maddie Ziegler, 18, in the role of an autistic teen named Music in her debut movie
Appearing on Australian TV program The Sunday Project, the Chandelier singer, 45, said she simply cannot make art without the 18-year-old dancer
Maddie, who does not have autism, stars as an autistic teen being cared for by her drug dealer sister, played by Kate Hudson
Sia struck up a close friendship with Maddie after casting the teenager in the music video for Chandelier when she was just 11
Sia has once again defended her decision to cast Dance Moms star Maddie Ziegler as an autistic teen in her movie debut, Music, after facing furious backlash for not using an actress with the disorder.