Which Twenty Million Sweethearts actress was widely known for performing in RKO's musical films?
Twenty Million Sweethearts:  The film stars Pat O'Brien, Dick Powell and Ginger Rogers. Ginger Rogers: Ginger Rogers (born Virginia Katherine McMath; July 16, 1911 – April 25, 1995) was an American actress, dancer, and singer, widely known for performing in films and RKO's musical films, partnered with Fred Astaire.
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