Legendary K-Pop star 옥희, known for her hit songs '나는 몰라요' and '이웃사촌', has passed away at the age of 73 due to kidney cancer. She was a member of the 5-member girl group '서울시스터즈' and was active in the music industry since the 1970s. | Legendary K-Pop star 옥희, known for her hit songs '나는 몰라요' and '이웃사촌', has passed away at the age of 73 due to kidney cancer. She was a member of the 5-member girl group '서울시스터즈' and was active in the music industry since the 1970s.