Chrystal Soo Jung (born October 24, 1994), better known as Krystal Jung, Krystal, or by her Korean name Jung Soo Jung, is a Korean American singer and actress. Discovered by SM Entertaiment in 2000, she began filming for commercials and music videos by 2002. She is a member of both the South Korean girl group f(x) and the ballad group SM The Ballad, and has participated in various television dramas such as High Kick 3, The Heirs, and My Lovely Girl.