Kim Sung-jae (Hangul: ???; Hanja: ???; April 18, 1972 – November 20, 1995) was a South Korean singer, rapper, dancer, and model, best known as a member of Deux, an influential early K-pop and Korean hip hop group that rose to fame in the early 1990s.
Sungjae died of an apparent murder in 1995 at the age of 23, although to some the exact circumstances surrounding his death are considered an unsolved mystery.