NMIXX is a South Korean girl group formed by JYP Entertainment, with Australian-Korean vocalist Lily as one of its main singers known for a powerful, clear tone. This snippet isolates her singing the memorable 'knock knock, follow follow me' hook from music video audio, which fans clipped and uploaded to soundboards. It spread through K-pop edit communities where short vocal hooks are reused for intros and transitions. The clip endures because Lily's distinctive voice is instantly recognizable to NSWER fans and the playful knock-knock phrasing fits a wide range of lighthearted videos.