http://en.wikipedia.org/wiki/Sinn_Sisamouth

Sinn Si Samouth (ស៊ីន ស៊ីសាមុត) (1935–1975) was a famous and highly prolific Cambodian singer-songwriter in the 1950s to the 1970s.
Widely considered the "King of Khmer music", Samouth, along with Ros Sereysothea, Pan Ron, and other artists, was part of a thriving pop music scene in Phnom Penh that blended elements of Khmer traditional music with the sounds of rhythm and blues and rock and roll to make a Westernized sound akin to psychedelic or garage rock. Samouth is believed to have been killed under the Khmer Rouge regime in November 1975.