In This Shirt was released in 2010 by British musical group The Irrepressibles, led by Jamie Irrepressible, on the debut album Mirror Mirror. The track built a cult following for years before short excerpts spread widely on TikTok and YouTube edits in the early 2020s, where creators paired its climax with fictional characters and emotional scenes. Its mix of orchestral pop and vulnerable singing made it a reusable shorthand for heartbreak, which is why new edits still use the same passage today.