With a stipulation in her contract that doesn't require her to sing live due to social anxiety, Sia has enlisted the likes of Lena Dunham and Shia Lebouf to star in her music videos and live performances in her stead. But for the 2015 GRAMMYs, the reclusive singer brought what might be her most surprising guest star yet.

Former Saturday Night Live actress and Bridesmaids star Kristen Wigg joined the "Chandelier" 12-year-old music video sensation Maddie Ziegler to give an interpretive dance of Sia's hit single. While Sia performed with her back to the audience, the duo made wild faces at the camera, hugging and clawing at each other while prancing around what looked like a hipster's dream apartment. 

 "Chandelier" details Sia's former alcoholism; it looked here as if Wigg played Sia's "devil" side, fighting with Ziegler, the "angel" side trying to help Sia. The result looked like Sia might've found her way to health and happiness.

"Chandelier" was a standout moment of GRAMMY performances that included equally emotional stages from Katy PerryKanye WestAriana Grande and more.