Kate Hudson Shows Off Toned Abs and Flashes Her Shaved Head on 'Sister' Set - See the Pic!

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Kate Hudson is looking fierce!

The 38-year-old actress was spotted in Los Angeles on Wednesday, rocking tiny sky blue shorts and a matching sports bra, while on the set of her new secret project with Sia, titled Sister.

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Not much is known about the project, which required the Oscar-nominated star to shave her head in July. But, what we do know is that she’ll star alongside Maddie Ziegler.

In a recent interview with ET, Ziegler promised the Sia-directed project would be "unlike anything you've seen before" and credited Hudson with teaching her "everything."

"She's amazing, she's incredible," the teen dancer gushed about the Almost Famous actress. "She's becoming like a family member to me, I love her so much."

For more on Ziegler's admiration for Hudson, watch the video below.