Thank Your Lucky Stars (1943)
This film was an American musical comedy made by Warner Brothers as a WWII fundraiser, with a slim plot involving theatre producers. The stars donated their salaries to the Hollywood Canteen, a club that offered food, dancing, and entertainment for servicemen, usually on their way overseas. The club was founded by John Garfield and Bette Davis, who appear in the film. Hattie performs in a big production number on a Harlem set called, Ice Cold Katie... Won't You Marry That Soldier, along with Willie Best, Jess Lee Brooks, Rita Christian, and a chorus of singers and dancers.