Lee Ji-hoon, known professionally as WOOZI, is a South Korean singer, songwriter and record producer under Pledis Entertainment. He is a member of the boy group SEVENTEEN, the leader of its vocal team sub-unit, and its special sub-unit Hoshi x Woozi. In 2022, he made his solo debut with Ruby. Aside from his work as a soloist and with SEVENTEEN, Woozi has also written for other K-pop artists such as NU'EST W, Ailee, and I.O.I.