Arising in the late nineteenth century, the operetta form was lighter than opera but more Europeanized and less vernacular than musical comedy, with a primary emphasis on singing rather than dancing. The operetta was still popular during the movie-musicals boom of the early talkie era, when it provided a platform for such stars as Jeanette MacDonald, Grace Moore, and German sensation Lillian Harvey, who was imported to Hollywood for MY LIPS BETRAY. Set in one of the mythical European monarchies beloved of operettas, the story features Harvey as an aspiring but unsuccessful singer whose career soars when she is mistakenly identified as the King's latest consort. John Boles plays the King, Swedish shtick specialist El Brendel plays the King's chauffeur, and the King's gadget-laden car, complete with built-in TV, also plays a major role. Preservation funding provided by Twentieth Century Fox Film Corporation. 35mm. (MR)