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Cheon Soo-yeon, better known by the stage name Song Ji-hyo, is a South Korean actress and model. Song is one of the regular cast members of the South Korean variety show Running Man since 2010, which brought her international recognition. She was a cover model for Kiki Magazine before she made her acting debut in the feature film Wishing Stairs (2003), the third installment in the Whispering Corridors film series. Wikipedia