Kim Yoo-jung, known simply as Yoojung, is a South Korean singer, dancer, former member of AB AVENUE and member of LABOUM. She graduated from Dongguk University College of Education Affiliated Girls' High School and later obtained a bachelor's degree in Practical Music from Myongji University. She made her debut in 2010 as pat of the project group AB AVENUE, a duo that had rotating members, with the single "Only You". She left less than a year later and in 2013, appeared as an impersonator of singer Lee Soo Young but was eliminated in the 2nd round. In 2014, she re-debuted as the leader, lead vocalist and rapper of LABOUM with their 1st single album "Petit Macaron". In 2016, she made her acting debut with a minor role in the drama "The Sound of Your Heart". In 2017, she entered the singing survival show "The Unit" and she ranked 20th as she was eliminated in the semifinals. In 2021, it was announced that she decided to leave the group as her contract expired. The remaining members signed with Interpark Music Plus but the group is currently on an indefinite hiatus (but not officially disbanded). In 2022, she participated in Soyeon’s solo fanmeeting which many fans interpreted as sign that she had rejoined LABOUM. The group held a mini concert in February 2023 and she was also part of it but no official announcement regarding her status within the group has been made.