Two Girls and a Sailor (1944)

After a successful nightclub performance, singer Patsy (June Allyson) and her gold digger sister Jean (Gloria DeHaven) hold a private show for servicemen, after which both become smitten with a sailor named Johnny (Van Johnson). Unexpectedly, Patsy and Jean receive a huge anonymous donation, which they use to refashion an abandoned warehouse into a canteen. As they continue working on their new business, they try to determine who their benefactor was, all the while competing for Johnny's love.