In this Vincente Minnelli-directed backstager, Fred Astaire dazzles in numbers set in a train station (By Myself), a penny arcade (A Shine on Your Shoes), a backlot Central Park (Dancing in the Dark) and a smoky cafe (Girl Hunt), the latter two with the incomparable Cyd Charisse. And when he, Nanette Fabray and Jack Buchanan play infants who ''hate each other very much!'' in the merry Triplets, it's more reason to love this movie very, very much. As the hallmark song which originated here goes, That's Entertainment!