No one ever came anywhere near Geeta Dutt in the matter of sexy songs - despite the continuous ppropaganda orchestrated by certain "great" singers...!!
Playback singing is not merely a question of voice but also of suitable expression concerning situation AND role - in which Lata is only equalled, if not surpassed by, Mohd Rafi..
Concerning Lata's behaviour,NO SMOKE WITHOUT FIRE! (no such complaints about Rafi, Saigal, Kishore who enjoyed simil...
Anyone with normal vision can see that the actress in this clip is Vyjayantimala who did not feature in TANGAWALI.
The scene used here is taken from the COLLEGE GIRL Rafi-Lata song "Pahle Pahle Pyar ka ishara" (present on You Tube)