![](https://hips.hearstapps.com/hmg-prod.s3.amazonaws.com/images/gettyimages-1327669397.jpg?crop=1.00xw:0.755xh;0,0.115xh&resize=320:* ""Stillwater" Red Carpet - The 74th Annual Cannes Film Festival")
A Sia performance is always a thing of beauty—annnd mystery—but a cameo from a nude leotard-clad Kristen Wiig? Now that's something special.
During tonight's Grammy Awards, the Saturday Night Live alum joined Sia onstage for "Chandelier" alongside Dance Moms protégé Maddie Ziegler. But here's the thing, there was NOTHING funny about it. Wiig was an utterly serious, compelling vision as she sauntered and twitched around the stage, which had been transformed into a messy apartment set.
Watch the performance below:
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