Ros Sereysothea was one of the stars of that era. Listen to her song https://m.youtube.com/watch?v=y04fy9GywSo. It says, "This year I am 16. There is no worry. Life is like a free flower."
https://music.apple.com/sg/album/%E1%9E%8F-%E1%9E%9A%E1%9E%96-%E1%9E%84%E1%9E%96-%E1%9E%99/1533398586?i=1533398587
Sadly, many of the singers from that time disappeared or died during the Khmer Rouge regime. While, it's nice that people still remember them today. I recommend the documentary “Don't Think I've Forgotten: Cambodia's Lost Rock and Roll” to learn more about this era of music.
https://youtu.be/4GH_N6EE8oA