When did the group debut that Kang Sung-hoon is a part of?
Kang Sung-hoon (singer) Kang Sung-hoon (hangul:강성훈, born February 22, 1980) is a South Korean singer from the 90's South Korean boy group Sechs Kies. Sung-hoon is the main vocalist of SechsKies and is referred to having the best singing voice of the group. After Sechskies had disbanded in 2000, Sung-hoon pursued a solo singing career, signed under Laful Entertainment at the time. His nickname Hoony is the title for his third album and his official fan club is called Hoony World.
F(x) (band) f(x) ( ; Hangul: 에프엑스 ) is a South Korea-based girl group formed by S.M. Entertainment in 2009. Since their debut, f(x) has released four full-length albums, two extended plays, and one repackaged album. The group is currently composed of four members: Victoria, Luna, Amber, and Krystal. It was originally a five-piece group (with Sulli, who later departed from the group in August 2015).