Continuity mistake: After Bobby Darin loses the Academy Award for supporting actor, he and Sandra Dee argue and threaten to leave one another. Sandra Dee jumps into her pink '63 Cadillac Coupe Deville and roars away as Bobby Darin jumps into his red '61 Cadillac Convertible and futilely tries to start it. The car's battery fails, and we see the four headlights flicker and go dark. Enraged, Bobby Darin jumps out of the convertible and begins smashing the car with a golf club. When he starts smashing out the headlights, all four lights are now glowing brightly.
Audio problem: Although Kevin Spacey actually sang for the soundtrack, his lip-sync blunders are noticeable in every song, and virtually all of the musical routines in this film are out-of-sync with the audio track. Even rhythmic hand-clapping on stage is out-of-sync.