Jung Soo Jung (Hangul: 정수정; born October 24, 1994) but better known as Krystal, is an American-born South Korean idol singer and actress. Discovered by SM Entertainment in 2000, she began filming for commercials and music videos by 2002. She is currently a member of the Korean quintet girl group f(x), formed by SM Entertainment in 2009. Krystal was born in San Francisco, California, where her family from South Korea... see more