Ziegler, who first showed up as a wild dancer in Sia's "Chandelier" music video, also appeared with actor Shia LaBeouf in the artist's controversial video for "Elastic Heart." Watch as Ziegler re-enacts the "Elastic Heart" video with a similarly dressed dancer (not LaBeouf, unfortunately) in the video above.
'Saturday Night Live' Recap: Iggy Azalea and Jim Carrey Dance Wildly to Sia's 'Chandelier'
For her second performance, Sia -- who again donned a black veiled visor -- took a minimalist approach by performing her nine-month-old "Chandelier" alongside a sad-looking mime. The song has received Grammy nominations for Record of the Year, Song of the Year, Best Music Video and Best Pop Solo Performance.
"Chandelier" and "Elastic Heart" are from Sia's latest album, 1000 Forms of Fear.