Ladka Ladki(1966)

A dutiful son vows that he will get married only after his sister is settled in life. The sister is a woman who was a victim of child marriage. Her brother is a talented musician who performs in musical shows around town and in one of them, where the theme involved making fun of modern women, he falls foul of another gifted artiste, who vows to teach him a lesson. Enmity turns to love but he still has to get his sister suitably married...