Sia & Maddie Ziegler at #Coachella. | Photo: Kevin Winter/Getty Images…

Sia & Maddie Ziegler at #Coachella. | Photo: Kevin Winter/Getty Images…

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Sia & Maddie Ziegler at #Coachella.? | Photo: Kevin Winter/Getty Images

A photo posted by Billboard (@billboard) on

Sia & Maddie Ziegler at #Coachella.? | Photo: Kevin Winter/Getty Images