It was “Once More, With Feeling!” It was Kay Kendall’s last movie; she died shortly thereafter, of leukemia, I think. It’s a funny movie and worth seeing, although her harp playing is silly as she mugs for her audience. Yul Brenner also destroys a harp, so easily that it’s obviously made of balsa wood or something similar. And he gives her a harp as a gift which is one of the most gaudy excuses for a musical instrument you’ll ever see. I have no idea if it was real or a prop or a harp that had been tarted up just for looks. You can see this movie sometimes on Turner Classic Movies.