"Shake It Out" is a song by English indie rock band Florence and the Machine, released as the first official single from their second studio album Ceremonials (2011). It was written by Florence Welch, Paul Epworth and Kid Harpoon, while production was handled by Epworth. The song was digitally released in Australia on 14 September 2011, and it was available in the United States on 19 October. It had its radio debut on XFM on 14 September 2011 in the United Kingdom.