Choi Yoo Jung, Choi Yu Jung, Choi Yu Jeong, Choi Yoo Jeong, or just Yoojung as she's often known, is a South Korean singer. Born November 12, 1999, she is best known for her participation in the hit survival reality program, “Produce 101” (2016) and her subsequent addition to the idol group I.O.I. Now a member of idol group Weki Meki, she has made appearances in several Korean variety shows including, “My Mad Beauty 3” (2019).