I just got extremely protective, as I'm over Maddie," Sia said to Benjamin ... "It was so quick, and we were friends for over a year before we got together." Although Ziegler had once vowed ...

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An curved arrow pointing right. Maddie Ziegler, 13, is starring in Sia's latest music video, "Cheap Thrills." This is the fourth video the two have collaborated on, along with "Chandelier ...