Singer Frances Langford stars as herself in Purple Heart Diary. The film is a reenactment of Langford's USO tours during WW II, as reported in the singer's newspaper columns for the Hearst syndicate. Also appearing as themselves are two of Langford's fellow troupers, singer Tony Romano and comic pianist Ben Lessy. Since Langford couldn't very well participate in a fictional wartime romance (her actual love life was public domain thanks to the various Hollywood columnists of the era), the love interest is handled by Aline Towne and Brett King, cast respectively as an army nurse and a crippled ex-football jock. The musical sequences in Purple Heart Diary play a lot more credibly than the melodramatic "courage under fire" setpieces.
~ Hal Erickson, All Movie Guide