Lee Won-hee, known mononymously as WONHEE, is a South Korean singer under Belift Lab. She is a member of the girl group ILLIT, formed through the 2023 reality competition show R U Next?. Lee Won-hee, known mononymously as WONHEE, is a South Korean singer under Belift Lab. She is a member of the girl group ILLIT, formed through the 2023 reality competition show R U Next?.