Choi Yoo-jung, known mononymously as Yoojung, is a South Korean singer, dancer, rapper and actress signed under Fantagio. She debuted as member of I.O.I in May 2016 after achieving third place in the 2016 survival program Produce 101. In January 2017, I.O.I officially disbanded after eleven months of promotion. Following disbandment, she returned to her respective agency and eventually debuted with Weki Meki in August 2017. Choi debuted as a solo artist with the single album Sunflower in September 2022.

I.O.I was a South Korean girl group formed by CJ E&M through the 2016 reality show Produce 101 on Mnet. The group was composed of eleven members chosen from a pool of 101 trainees from various entertainment companies: Jeon So-mi, Kim Se-jeong, Choi Yoo-jung, Kim Chung-ha, Kim So-hye, Zhou Jieqiong, Jung Chae-yeon, Kim Do-yeon, Kang Mi-na, Lim Na-young, and Yoo Yeon-jung. They debuted on May 4, 2016, with the EP Chrysalis and actively promoted as a whole and as a sub-unit for less than a year.