KK’s debut album, “Pal,” was released in April 1999. He followed it up with “Humsafar,” which was released in 2008. Best known for his incredible achievements as a playback singer, KK contributed to the soundtrack of many movies. On IMDb, he is credited as a member of the music department on 317 titles, while he is credited on the soundtrack of 154 titles.
Source: https://www.distractify.com/p/what-happened-to-kk