반짝아들 안녕! Jessica Jung (Hangul: 제시카, Korean: 정수연; born April 18, 1989), is a Korean-American singer-songwriter, actress, fashion designer, businesswoman, and model, presently based in South Korea. Jung was a member of K-pop girl group, Girls' Generation, as one of the main vocalists from the group's debut on August 5, 2007.