Korean; 정수정; English: Krystal) is a famous Korean artist, born on October 24, 1994 in San Francisco, US , is a member of the Korean girl group f(x), whose sister is a member of Girls' Generation, Jung Soo-yeon, was discovered by SM Entertainment in 2000; became a trainee of SM in 2006. Its practice students ; in 2009, as a member of f (x) officially unveiled. Its main representative works are "the more you look cute", "heirs", "high kick 3", "to me, cute her" ( with Rain co-starring) and so on.