Jessica Jung (Korean name: Jung Su-yeon; Hangul: 정수연; Hanja: 鄭秀妍; born April 18, 1989), better known by her stage name Jessica, is an American singer, dancer, and a musical theatre/television actress. She is a member of the girl group Girls' Generation (abbreviated as SNSD).

Krystal Jung (Korean name: Jung Su-jung; Hangul: 정수정; Hanja: 鄭秀晶; born October 24, 1994), better known mononymously as Krystal, is a Korean-American pop singer and commercial model. 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 dance group f(x), formed by SM Entertainment in 2009.

They're called as Korean Pop hottest idol sisters pair. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.