During the last 2 music numbers, Uncle Alberto's hat appears and disappears throughout the scene. It can be seen on and off the table before and after Ricky has it on stage. Even after the hat is smashed by Uncle Alberto, it reappears unbroken on the table.
Before introducing Lucy to his family, Ricky says they only know a few words of English. However, he introduces both Lucy and Little Ricky to everyone in English instead of Spanish.
Lucy accidentally says "macha grassa" instead of "muchos gracias," which Ricky says means "big fat pig." This is not accurate, as big fat pig in Spanish would be "grande cerdo gordo."
Despite being in a Cuban night club, both Ricky and the emcee exclusively address the audience in English.