IU first teased that a new single was in the works while onstage at the
35th Golden Disc Awards on January 9, 2021. As she accepted the Digital Daesang award for "
Blueming", she stated that the new song would be "refreshing" and "gives people strength". On January 11, her label, Edam Entertainment, announced that she would return with a pre-release single titled "Celebrity" on January 27, 2021. The label hinted that the new song would be a cheerful pop sound with energetic music genre. "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. The single marked her first offering following the release of the chart-topping single "
Eight"—a collaboration with BTS'
Suga—in May 2020. The track was written and composed by IU, Ryan S. Jhun, Jeppe London Bilsby, Lauritz Emil Christiansen,
Chloe Latimer and Celine Svanback, with arrangement conducted by Bilsby, Christiansen and Jhun. ==Composition==