"Buckle" is a song by Florence and the Machine released as the fourth single for their sixth album, Everybody Scream. The song was released with the album on 31 October 2025, coinciding with Halloween, before being released as a fourth single for the album on 4 November 2026. Considered a fan favourite on the album, "Buckle" was written by Florence Welch along with Mitski and produced with Aaron Dessner. Musically, "Buckle" is an acoustic guitar driven chamber folk song with little instrumentation that describes toxic relationships, insecurity and vulnerability.