Sia is in this phase of life where she does not want people to see her face, so she has enlisted the help of various performers to wildly convulse on stage while she inconspicuously sings in the background.
During Sunday's Grammys performance of "Chandelier," Kristen Wiig got that honor -- alongside Sia's mini-muse Maddie Ziegler from Dance Moms.
Wiig absolutely slayed it, pulling off that blonde wig like she was birthed with it on. Let's hope she's available for the world tour.