Changes is a 1971 David Bowie song from his Hunky Dory album, released as a single and built around its stuttered ch-ch-ch-changes refrain and jaunty piano line. Written as a commentary on artistic reinvention, it became one of Bowie's signature songs and a fixture of film soundtracks and adverts for decades, including a 2004 cover recorded for the Shrek 2 soundtrack. Its message made it a natural fit for before-and-after content, and short clips of the hook now soundtrack countless glow-up and transformation edits across TikTok and YouTube.