Red, Hot and Blue (film)

Red, Hot and Blue is a 1949 musical comedy film starring Betty Hutton as an actress who gets mixed up with gangsters and murder. Frank Loesser wrote the songs and also acted in the film.

A bigshot, Bunny Harris, is introduced to Eleanor and might help her career. While in his apartment, though, Bunny is gunned down and Eleanor learns from HairDo to her surprise that Bunny was a crook. She holds the bad guys at bay until Danny rides to the rescue.

Source: Wikipedia