With trusty Dance Moms protégé Maddie Ziegler by her side, Sia — the artist of many faces, and often no faces at all — set the Grammy Awards stage on fire Sunday.

Of course, Ziegler wasn’t Sia’s only special guest this evening; Saturday Night Live vet Kristen Wiig — yes, that Kristen Wiig — also danced along to “Chandelier.” (Move over, Lena Dunham!)

Seriously, though, who knew Wiig was such a phenomenal — not to mention emotional — dancer?

Even before taking the stage, Sia and Ziegler had heads turning (and scratching) on the red carpet when they showed up in matching wigs; Sia’s, naturally, was so big that it covered her entire face.

Your thoughts on Sia and Ziegler’s latest pairing — not to mention the incredible addition of Wiig? Rewatch the clip and then grade the performance below, then drop a comment with your full critique.

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