A dance-pop and electropop track, "Celebrity" was written by IU, with additional composition by Chloe Latimer and Celine Svanback, and Ryan S. Jhun, Jeppe London Bilsby, Lauritz Emil Christiansen, —the last three also handled arrangement.

[2] "Celebrity" was subsequently released on January 27 for digital download and streaming as the lead single off of IU's fifth Korean-language studio album, Lilac.

[4] Regarding the musicality of the single, EDAM Entertainment stated that "the song has a bright and cheerful pop sound that can energize those listening to it.

[7] Upon release, "Celebrity" debuted atop the Gaon Digital Chart,[8] becoming IU's 17th number one single and 25th number-one overall when including featured appearances and OSTs.

[12] The music video, directed by Paranoid Paradigm and produced by VM Project Architecture,[13] was subsequently uploaded on January 27, in conjunction with the release of the single.