Timing is the fourth Korean mini-album by the leader and main rapper of what boyband?
Kim Hyun-joong Kim Hyun-joong (; born June 6, 1986) is a South Korean actor and singer, and the leader and main rapper of boyband SS501.
Kim Jae-duck Kim Jae-duck (born on August 7 1979) is a South Korean singer, rapper, and choreographer. He is known as a member of Sechs Kies, which was a rival band to the top boy group in the 90's, H.O.T. and reunited in 2016. When Sechs Kies disbanded in 2000, he started a new band, J-Walk with Jang Suwon, also from Sechs Kies. Kim is known for his Busan accent and his nickname is "Ducky" as a reference to his name.