One Time was Justin Bieber's debut single, released in 2009 as the introduction to his first album, My World. The song helped launch the Canadian singer from online videos to mainstream radio, becoming a defining track of late-2000s teen pop. Its bright chorus and youthful energy made it easy to quote and reuse, and the clip has since lived on in throwback edits, reaction videos and short-form posts. Fans still return to it as a shorthand for Bieber's earliest era, before his sound grew more mature.