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'''Yoo Jeong-yeon''' (hangul: 유정연, originally named '''Yoo Kyung-wan)''' was born on November 1, 1996 in Suwon, South Korea; better known by her first name, '''Jeongyeon''', is a South Korean singer. She is a member of the girl group, Twice. She is the lead vocalist of the group.And also known as "The Girl Crush of the Group", and she the second oldest in the group.