The enigmatic singer and songwriter Sia joined season eight of The Voice to mesmerize the audience with a performance of her single "Elastic Heart." The performance was a nod to songs from film soundtracks and Sia's single, a collaboration with Diplo and The Weeknd, was originally featured on the 2013 soundtrack for The Hunger Games: Catching Fire. Sia re-recorded the track for her 2014 album 1000 Forms of Fear and released it sans her collaborators early this year. Donning her signature face-shielding wig, which left just enough space for her lips, Sia belted out the song with little-to-no effort.
Sia is a veteran when it comes to The Voice, since she served as an adviser for Christina Aguilera back in season one. With her engaging performances and impeccable vocals, we're wondering why she hasn't become a staple on the reality show. While we wait to see if she does an encore appearance, you can purchase "Elastic Heart" and 1000 Forms of Fear on iTunes. Let us know if Sia's performance moved your heart after you watch her performance on The Voice right here.