1956, the song 'Rasik Balma' from the film Chori Chori won the Best Song Filmfare Award. Lata refused to sing it live in protest of absence of a Playback Singer category. The category was finally introduced in 1958. Though, separate awards for male & female singers were introduced later on.
Lata Mangeshkar monopolized the best female playback singer award from 1958 to 1966. In 1969, Lata made the unusual gesture of giving up Filmfare awards in order to promote fresh talent