Cosmology

I'm looking for a song from an Indian movie that I'm guessing was made in the late seventies, and had a slim, long haired young woman singing an upbeat track. During the chorus, the camera would focus on flashing disco lights, blur, then dissolve the picture into the next shot. I think she had backing dancers energetically moving around her but she kept quite still and serious while she sang. I would love to hear the song again, if anyone knows what is.