Park Sun-young, known professionally as Luna (루나), is a South Korean singer, dancer, musical actress and television host. She debuted as a member of the girl group f(x) in September 2009. In May 2016, Luna released her solo EP Free Somebody. In November 2019, the single "Free Somebody" was listed in Billboard's greatest K-pop songs of the 2010s. In September 2019, Luna left SM Entertainment and joined Humap Contents. In February 2021, Luna established her entertainment agency, Grida Entertainment.