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Earlier this week Sia sparked controversy when she released a video for track Elastic Heart, which featured Hollywood actor Shia LaBeouf and 12-year-old Maggie Ziegler.
In the video the actor and 12-year-old, who are both wearing n**e dirt-smeared leotards, wrestle each other, and it quickly faced a lot of angry criticism with people describing it as disturbing and "unacceptable".
One upset fan said the video "Smacks of child molestation #pervert #unacceptable #childabuse...Explain please!"
Maddie Ziegler in 2012
And: "Sia's 'Elastic Heart' video is disgusting."
Sia later wrote on her website: All I can say is Maddie and Shia are two of the only actors I felt could pay these two warring Sia states.
I apologise to those who feel triggered by Elastic Heart, my intention was to create some emotional content, not to upset anybody.
But who is Maddie Ziegler and how did she come to be a part of the singers latest video?
Maddie is a professional dancer, model and actress who is best know for reality series Dance Moms, which follows the early careers of children in show business, as well as the role their mums play.
Sia - Elastic Heart feat. Shia LaBeouf & Maddie Ziegler
She was born in Pittsburgh, Pennsylvania and started dancing at the young age of two and currently attends the Abby Lee Dance Company and is homeschooled after leaving Sloan Elementary School.
Maddie, who has got over 500,000 Twitter followers is trained in tap, jazz, ballet and aerial dance.
Shes also appeared in other music videos, including another one of Sias music videos for Chandelier, which won the 2014 MTV Video Music Awards.
She's modelled for a host of fashion brands, including Sally Miller and Glitzy Girl and has appeared on the cover of Kode magazine.
Last October she released a fashion line with her sister The Maddie & Mackenzie Collection.
Source: http://www.mirror.co.uk/3am/celebrity-news/who-maddie-ziegler-everything-you-4947828