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.
Lee Jong-hyun Lee Jong-hyun (Hangul: 이종현; ] ; born on May 15, 1990) is a South Korean musician, singer-songwriter and actor. He is the lead guitarist and vocalist of South Korean rock band CNBLUE.