Melodia do Amor

The comment posted before mine was unfortunately inaccurate. Lynn Martin did provide the vocals for Ann Sheridan in this film. While the studio had trusted her untrained but acceptable voice in a great number of dramas, thrillers and minor musicals before this, they were not ready to let her tackle a major musical with her own voice. The whole idea of a voice double is to sound as similar as possible to the person on screen. Lynn Martin was the perfect choice, even a certain nasal tone, but a much more polished sound. If you have the chance to hear her in quite a few low-budget musicals she sang in at other studios, you will recognize her immediately. She did not have to change her voice much to be a great match for Ann Sheridan and this is why she was chosen. Personally, as much as I love Ann Sheridan, i think she sounded much better with a professional singing voice.

A lot of well-known actors and actresses sang in scores of films but were dubbed just once or twice - that is not unusual at all. The same happened to Dorothy Lamour, Carole Landis, Shirley Temple and Patricia Morison (of KISS ME KATE fame) among others. So this is not even a factor.

(But it is true that Lynn Martin NEVER dubbed Rita Hayworth at any point.)