Revealing mistake: When Lazarus is performing in the bar, Rae takes a drink from an empty beer bottle twice.
Revealing mistake: After Erika stabs herself in the lobby of the conservatory there is no trace of blood on the knife when she pulls it out. (02:02:10)
Revealing mistake: As a very young Otis Williams listens to The Cadillacs on stage in Detroit, the joint is rockin' with the music, but most of The Cadillacs have no microphones.
Revealing mistake: In the jazz club, the saxophone player's finger movements don't match what he is playing.
Revealing mistake: Anytime the camera is on Richard Dreyfuss' hands while he's playing the piano, it is clear that he is not actually playing; his hands are frequently in the wrong part of the keyboard for the sound being produced. At other times, when his hands are moving down the keyboard, the pitch we hear is going up, or vice-versa.
Revealing mistake: At the end of the movie after Necros falls from the plane the camera cuts back to Bond, as he tries to struggle his way out of the nest. If you look closely under the nest you can see Necros at the start of his fall again. Also notice Necros is replaced by a dummy.
Revealing mistake: Right before the scene where Freddie meets with the band to try and make amends, he's arguing with that one man in the rain. After he walks away and it's raining only on him and on the pavement. If you look to the right there is no rain coming down on the grass or trees or anything else.
Revealing mistake: At the end of the movie when the Grandpa and grandson are tackled after being given the 'fortune cookies' right at the moment of impact the little boy has been replaced by a stunt double which is a grown man dressed in the same clothes. Like the dude has wrinkles and doesn't even resemble the boy at all.
Revealing mistake: As Lulu is pulling her fishing pole out of the school steps, you see if you watch closely that the pole actually passes through the concrete of the steps rather than her lifting it over. (00:02:00)
Revealing mistake: Marie and Nutcracker go down the river in a swan shaped boat, and Nutcracker is standing up on the back moving the boat along with large pole. In the water, you can see the reflection of the boat and Marie the way they are supposed to be. But the reflection of Nutcracker is not moving, and the pole is not reflected.
Revealing mistake: When Fish goes flying off the van, the mat on which he lands is visible. (In subsequent shots, it is gone.). (00:06:55)
Revealing mistake: When Louis is trying to get Lester to apologize to Cleo after hitting her, lots of extras on the sidewalk and across the street can be seen watching the whole scene being shot.
Revealing mistake: When Majestic is discussing killing the police to Marcus, the shot of the Uptown station house has the same figure ascending its steps in both shots, revealing that one shot was used twice instead of actually using two separate shots of the same location.
Revealing mistake: When the chipmunks are singing 'How we roll' there is a shot of Ian with some people in a private room. The music continues to play as they listen and the stage is reflected in the glass, how ever the chipmunks, back up singers, dancers, instrument players and audience are missing. (01:17:40)
Revealing mistake: When Ariel is playing chicken with the oncoming truck, as she is standing on both cars, notice that her hair is dark brown to black in colour, then it's blonde again. The hair colour changes a few times. It's obviously a stunt woman.
Revealing mistake: When the kids break the pipes in the bathroom, the dude sitting on the stall is wearing a visible thong while on the toilet.
Revealing mistake: During the sax player's solo (final concert), his fingers don't match the notes, and he stops moving his fingers before the solo is over. Also, the sax player in the blue jacket behind Buddy's right side often lags behind the sax player to his right. At times, it looked like the sax player was watching the sax player next to him to know when to play. Sometimes, he would put the reed in his mouth for a fraction of a section and just pretend to be playing. Near the end, both sax players seem lost and even laughing at themselves. (01:47:17)
Revealing mistake: At the beginning of the funeral for the girl who died in the motorcycle accident, the supposed corpse can be seen breathing. (01:14:35)
Revealing mistake: During the interview, you can see a monitor with the lyrics of "Something", even though he is supposedly improvising.
Suggested correction: This is a deleted scene. It is in the extras on the DVD but it is not part of the movie.
Revealing mistake: Just before she KOs the lecherous producer, Peggy Harper gives him a big stomp on his right foot. Or that's what it was supposed to look like because the adorable Betty Hutton just slams her foot on the floor at a very safe distance from Howard Freeman's. (00:24:15)