[4] Kang Sung-hoon, who was studying abroad in Hawaii, was scouted by DSP Entertainment, along with friend Eun Ji-won in a nightclub.

In 2001, he released first album"비상(Bee Sang)" with title song "고백(Confessions)" and most of the Sechs Kies members chorus "1년 되는 날 (1st Anniversary)".

In 2002, Sung-hoon released second album "Kang Sung Hoon Vol.2" with hit song "My Girl" and received great response.

On January 22, 2007 Sung-hoon participated in a fashion show called, "Han Bok", which was to raise money to build homes for others.

[8] On June 12, 2015, Sung-hoon released 'Someone Make Me Laugh' for SBS weekend drama ‘Divorce Lawyer In Love’ OST[9] On February 20, 2016, Sung-hoon held small Concert The Fifth Season in Seogang University, Mary Hall Grand Theatre; tickets were reportedly sold out within one minute.

[10] In 2016, SechsKies reunited after their disbandment 16 years prior in a Korean variety TV show called "Infinite Challenge".

[15] On January 1, 2019, Sung-hoon released a statement via his official fan cafe that he had agreed with YG to terminate his contract as of December 31, 2018 and left Sechs Kies.