The sound comes from the chorus of the Chinese pop song widely shared online as Super Idol, whose opening line is often romanised by English speaking users as Super Idol no shiao. Short excerpts of the chorus spread first on Chinese video platforms and then across TikTok around 2021, where the earnest singing and smiling performance were reposted, remixed and used as a reaction to confident or cheerful moments. Its short length and familiar melody kept the clip in circulation long after the first wave of edits.