“Elastic Heart” is a song by Australian recording artist Sia featuring Canadian recording artist The Weeknd and American producer Diplo, taken from the soundtrack for the 2013 American film The Hunger Games: Catching Fire. The song was produced by Diplo and American producer Greg Kurstin. It was released on 1 October 2013 as a single from Catching Fire by RCA, Republic and Lionsgate.
“Elastic Heart” was well-received by music critics and peaked at number 7 on the singles chart of New Zealand and was certified gold by the Recorded Music NZ. It also appeared on the charts of Australia, Belgium, Switzerland and the United Kingdom. In 2014, Sia re-recorded a solo version of “Elastic Heart” for her fourth studio album 1000 Forms of Fear. The solo version was released in 2015 as a single from the album and was accompanied by a music video, which features actor Shia LaBeouf and Maddie Ziegler.