Fun's in fashion when Fred Astaire and Ginger Rogers (plus Irene Dunne and Randolph Scott) enter the ultrachic Parisian world of high fashion in Roberta. The third Astaire/Rogers film, a silky screen adaptation of the 1933 Broadway hit, has all that fans have come to expect from the pair's movies: a jaunty romantic plot, fabulous sets, memorable music and above all, incomparable dance magic to match the score. The most pleasant moments in Roberta arrive when Astaire and Rogers turn the story upside down and dance on it. Astaire may sing "I Won't Dance" but his feet betray him.