Ros Serey Sothea (Khmer: រស់ សេរីសុទ្ធា or more correctly រស់ សិរីសុទ្ធា) (c. 1948 – c. 1977) was a Cambodian singer. She was active during the final years of the Sangkum Reastr Niyum period and into the Khmer Republic period. She sang in a variety of genres; romantic ballads emerged as her most popular works. Despite a relatively brief career she is credited with singing hundreds of songs. She also ventured into acting, starring in a few films. Details of her life are relatively scarce. She disappeared during the Khmer Rouge regime of the late 1970s but the circumstances of her fate remain a mystery. Norodom Sihanouk granted Sothea the honorary title "Queen with the Golden Voice."