Elements of this movie in order of importance:

1. Fred Astaire & Ginger Rogers dancing on roller skates
2. Eric Blore (Sullivan’s valet) as an uppity hotel manager
3. The awful “you say potato, I say po-tah-to” song
4. E. Everett Horton as Fred’s fretful manager
5. A bunch more Gershwin songs, not that I can remember them
6. The plot

Famous ballet star Fred with a fake-Russian stage name is a closet jazz enthusiast, arranges to be on the same ocean liner as pop-musical star Ginger. As they get to know each other, a rumor spreads through the boat then the media that they’re already married. She is pissed at the rumors, goes home to marry her boring fiancee (there’s always a boring fiancee). Complications arise, a fake scandal is manufactured using a Ginger-faced mannequin, and Ginger agrees to secretly marry Fred so they can get publically divorced. But they stay together in the end. More importantly: they dance on roller skates.