The song was reported by
Billboard in January 2016 as being specifically written and recorded by Sia for the "coming-of-age film" which premiered at the
Sundance Film Festival on 24 January 2016. Otto Bell said: I'm incredibly grateful that Sia took the time to write and record this very special song. It's a wonderful vote of confidence for our documentary. I could not have imagined a more fitting, timeless piece of music for the film – it's such a beautiful girl power anthem! The single was released on 2 December 2016. ==Critical reception==