The 38-year-old singer and songwriter sang the song with her back to the audience, but DeGeneres assured viewers that the performance was live. The Chandelier music video features 11-year-old Dance Moms star Maddie Ziegler, who also appeared on Ellen to dance her routine.
Sia has penned songs for artists such as Madonna, Christina Aguilera, Britney Spears and Rihanna, and has also released several of her own albums. Her newest album, 1000 Forms of Fear, is scheduled for release on July 8.
Notable deaths of 2014 [PHOTOS]
Jason Aldean to extend Burn It Down Tour