Her teaser photos were posted through Facebook earlier today. Rocking cut-off jeans and a simple white tank top, under a casually draped checkered tee, Jieun manages to combine fierce with sexy.

1PS is short for '1PIECE-SCORE', meaning one music score, and that the four girls will be singing one song by matching each other's harmony. 

1PS has also revealed Yoonseo and Yena, and will be unveiling the final member soon before their debut in early March. Make sure to stay tuned for more news on 1PS!

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