Anmol Ghadi (1946)

Chander, who has nothing, and Lata, whose family has everything, are childhood sweethearts separated when her parents take her to Bombay. Years later a wealthy friend finds him work there in a musical instrument shop, and he discovers Lata has become a celebrated poetess under another name - and is engaged to the friend. Mehboob Khan's film was the biggest Indian release of 1946, and its twelve songs are why it is still played: Noor Jehan sings five of them, including Awaaz De Kahan Hai with Surendra, and a small number called Tera Khilona Toota made Mohammed Rafi's name.