Blue Moon was written by Richard Rodgers and Lorenz Hart in 1934, but the bom-bom-ba-bom intro comes from The Marcels' 1961 doo-wop remake, which topped the US Billboard Hot 100. Their bass-led vocal opening, arranged with a playful shuffle rhythm, became the record's signature and helped it stand out on early 1960s radio. Decades later the intro resurfaced as a meme audio for throwback edits, dance challenges and comedy skits on TikTok and YouTube, where its instantly recognizable rhythm signals nostalgia without needing the full song.