Jang Yoon Jeong (장윤정) (born February 16, 1980) is a semi-trot singer. She exploded into fame at the beginning of 2005 with her single 어머나! (an exclamation close in meaning to "Oh my goodness!"). Although in her 20s, she has decided to stick with a genre mainly appealing to older Koreans and has parlayed that into continued success, with three full albums (the latest one in October of 2006) and two "half" albums.

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