Jeongyeon – O Christmas Tree Mp3 DownloadYoo Jeong-yeon (Korean: 유정연; born 1 November 1996), known mononymously as Jeongyeon (Korean: 정연), is a South Korean singer. She is a member of Twice, a South Korean girl group formed by JYP Entertainment. == Early life == Jeongyeon was born as Yoo Kyung-wan on 1 November 1996 in