During the initial blind date between the girls and the rodeo cowboys, they take a walk along the beach. Upon entering the gate to the house, the sound of a ukulele being played is heard, but Buzz (the ukulele player) is holding the ukulele in one hand, not playing it.
When Grandpa demonstrates the jitterbug, he sings "A-Tisket, A-Tasket", but his lips never move.