Apart from the biographies of the iconic figures and official films made on real-life events, there is a related genre in cinema that rarely gets discussed or quoted by film enthusiasts. This is the genre in which writers-directors get ideas while reading the headlines/articles in a newspaper or magazine and then conceive an entire film on the same, without disclosing the actual event and names.
A poor girl singing in the daily passenger local gets spotted by a music director, accidentally travelling by train. Noticing her raw but melodious voice having an amazing tonal quality, he decides to give her a chance and takes her to the studio to record a song. He gives her a surprising make-over, encourages her to sing the fresh lyrics, and gets the recording done, resulting in a hit track.