Lee made her debut by joining MBC as a 15th generation comedian. She initially signed with CoKo Entertainment, but due to their bankruptcy, she later signed with FNC Entertainment.[3][4]
^Kim Yu-jin (September 3, 2021). "유세윤, 조리도구 왕좌 앞 카리스마 "준비됐다면 도전하라" (쿡킹)" [Yoo Se-yoon, charismatic in front of the cookware throne "If you're ready, try it" (Cooking)]. Xports News (in Korean). Retrieved September 3, 2021 – via Naver.
^Choi, Yoon-jeong (February 16, 2023). "노홍철·이국주·KCM, 해외 여행 떠나…'난생처음 우리끼리" [Noh Hong-cheol, Lee Guk-joo and KCM go on an overseas trip… 'For the first time in our lives] (in Korean). Newsis. Retrieved February 16, 2023 – via Naver.
^Cha Sang-yeop (December 30, 2022). "MBC연예대상' 전현무 대상… '나혼산' 올해의 예능프로그램(종합)" ['MBC Entertainment Awards' Jeon Hyun-moo Grand Prize... 'Nahonsan' Entertainment Program of the Year (Comprehensive)] (in Korean). Money S. Retrieved December 30, 2022 – via Naver.