강성훈

강성훈 (Kang Sung Hoon) (born February 22, 1980) is a vocalist from the 90s boy group Sechskies. He is the lead vocalist of the group and sometimes referred to having the best singing voice almost as Kangta's voice. After Sechskies initially disbanded in 2000, Kang Sung Hoon was considered to be born-again as a singer, and working under Laful Entertainment, but now is working for NH Media Entertainment. There were some little rivalry as Sung Hoon released 4 albums, as the leader of Sechskies did; Eun Ji Won. He served military time along with fellow group member Lee Jae Jin, in 2006. In 2002 Dynamic Korea, he performed on stage with Eun Ji Won, and also J-Walk, the duet consisting of Sechskies members Kim Jae Duc and Jang Su Won. On January 22 of 2007, Kang Sung Hoon participated in a fashion show called "Han Bok" which is to raise money to build homes for others. His nickname Hoony is the title for his 3rd album.

After some personal hardships, in April 2016, he came back with his fellow Sechskies members on the variety show Infinite Challenge.