Well I have this song in my mind for years. I remember hearing it in 80's when I was a kid and I'm guessing it was either from 70's disco era, or from early 80's.
here is my rendition of it: http://d01.megashares.com/dl/nWfSXF1/lady-lay-demo.mp3 (you enter 4 digit code for human verification and press the button next to it to reactivate your passport then Download File)
I remember female singers singin it. Who can they be?