I L<3ve Musicals!
#52 in the George Cukor filmography.
This is often described as far from Marilyn's best, but I really enjoyed it, and her vulnerable pussycat who purrs "My Heart Belongs To Daddy", gets imported Frenchman Yves Montand hotter than hell (by all accounts, off-screen too), and toys with English smoothie Frankie Vaughan, who does well in his only major Hollywood film.
There's a host of cameos, too, from Uncle Milty to Bing, but it's Marilyn you'll watch, already going a little off the boil, but still a confused little girl in a sexy woman's body. It's a pity that Montand is wrong in every respect for the material, but Tony Randall offers solid support, and I liked the songs.