Debut:
May 1, 1996
Lee Haejeong (Korean: 이해정) is a South Korean singer and member of the co-ed group UP (유피). She is the only member of the group to have stayed in the group throughout all of their lineups. After UP's disbandment, she was a regular on the EBS children's program "Ding Dong Dang Kindergarten" until 2001.