During the last skating sequence the ice was dyed black to add drama to the segment. The ice showed skate marks badly so it was covered with a layer of liquid dye to hide the marks. This can be seen by the splashing in fast turns. Near the end the liquid is starting to freeze and skate marks are visible.
Sonja Henie wanted to have three ice skating production numbers, but only two were finished and included in the film. Darryl F. Zanuck would only allow a third if Henie would pay the production costs for it, which she refused.
"The World Is Waiting to Waltz Again" by Harry Warren and Al Dubin, was recorded by John Payne, but not used in the film, as was another number, "I'm Lena, the Ballerina" recorded and filmed by Joan Davis.