In Da Club was released in 2003 as the lead single from 50 Cent's debut album Get Rich or Die Tryin' and quickly became one of the biggest hip hop songs of the decade. Its opening birthday line was written as a universal party hook, which helped the track get played at celebrations far beyond clubs. As short-form video and soundboards spread online, that opening seconds were clipped on their own and reused as a standalone sound, turning a chart hit intro into a default birthday audio for memes, edits, and messages.