Hyorin had auditioned twice for JYP Entertainment beforehand and was accepted on the second try. She was initially planned to debut in a trio group along with miss A's Min and Secret's Jieun. Plans, however, fell and she was dropped from the label. She later auditioned for Starship and was accepted. Soyu auditioned for Starship, singing a cover of Navi's "On The Road". Sistar made their first appearance through a Céci magazine photo in England shoot on March 19, 2010 for the clothing company FUBU
El 2 de marzo en el episodio de MBC “Quiz to Change the World” Jo Kwon, en la comedia de enredo “Three Guys and Three Girls”, por lo que él y Hyorin se volvieron en el centro de atención.
Las chicas Idolo del K-Pop desean a sus fans un Feliz Día de San Valentín
Hyorin de SISTAR mostró sus impresionantes aptitudes para el baile de Salón .