Continuity mistake: There are seven Wharvey Gals. Three on the stage singing, three with the wife, and one that she's holding. One of the girls even says that there are seven of them. Yet in the end, when Everett and his wife are walking down the street, there are only six. One that she is carrying, and five following.
Visible crew/equipment: When Terri sits down to talk with her aunt after Paul's graduation, you can see between her shirt and his pants on her right side there is a 1/8" wire used for the wireless mic.
Continuity mistake: In the scene where Dewey and Ms. Mullins are in the bar, the shots from behind Ms. Mullins sitting down show that her left hand is on the table. However, the shots showing the front of Ms. Mullins show her arms folded.
Continuity mistake: Stuart Sutcliffe talks in a Liverpool accent throughout the film. However, unlike the other Beatles, Sutcliffe didn't have a Liverpool accent. He was born in Scotland and raised in Lancaster. He didn't come to Liverpool until he was 16.
Continuity mistake: When Alvin is making the big SOS sign, one shot shows the whole beach and Simon and Theodore are in the middle of the big letter O. In the next shot, they are at the O's edge.
Other mistake: In the final scene both at the start when Fletcher is walking on stage and in a shot during "Caravan," just after Andrew mouths FU, when Fletcher puts a hand under his jacket the shot goes forward and then immediately shows the same footage in reverse. (01:27:55 - 01:32:45)
Continuity mistake: In the scene when Tina Turner is running away from Ike she has to cross a freeway. If you look closely you will see that she has on high heels then she has on sneakers as she is running across the freeway.
Continuity mistake: When Rico runs to the basketball court to spill about the Big Bounce, he begins to sit down on the court. After it cuts Rico starts to sit down again for the second time.
Factual error: In the scene where Mystery is playing "Rock & Roll All Nite" in the basement, Hawk is playing an Epiphone Special II guitar. The movie is set in 1978, and this guitar did not hit the market until 1996.
Continuity mistake: The entire plane is on a slant after the front wheel gets stolen in Central Park. Yet when the passengers are having the party upstairs in the next scene, the whole place is perfectly level.
Continuity mistake: When Rabbit and his mom's boyfriend were kicking each other's ass inside the Smith's trailer, Rabbit pushes or punches the boyfriend from the kitchen to the living room, breaking a small wooden post in a quick shot. A few shots later, when Rabbit returns to the trailer, the wooden post is intact. There was no time to fix it.
Factual error: Near the beginning of the film, a scene opens with the subtitle 'New York'. Strange, these New Yorkers drive on the left.
Audio problem: When Lizzie is performing at the end of the movie at the awards show, at the part where we see her from the back facing the blue light, her voice sounds like it's changing. It seems like it's someone much older singing, or the synthesizer went wrong. It just obviously isn't Lizzie's voice anymore.
Continuity mistake: When Loretta Lynn is at the radio station asking why the disc jockey had lied to them about playing her record, you see the picture of her that they took at home. It is a completely different pose than the one that you saw them take a couple of scenes earlier. She is looking in a different direction and she is not smiling as much as she was when they took it.
Visible crew/equipment: In the sequence where the young are in the field to clear up the rules of "chicken game" (or something), you can see a part of a microphone above them.
Continuity mistake: In the scene where Mariah, is on the "not a date" with Dice, and they're having dinner, they start to talk and in the different shots you see that the amount of wine in the glasses changes in every shot. (00:30:20)
Visible crew/equipment: Towards the end of the movie when Whitney Houston is in her hotel room with Kevin Costner you can see the mic in a reflection in the window of the suite.
Revealing mistake: When Dewey is singing the protest song about midgets in 1966, modern cars can be seen driving in the background.
Continuity mistake: When Walter is watching the fire go through the electrical system in the walls of the kitchen, watch the blender. One shot shows thick, chunky, white/orange stuff flowing out over the edge of the counter. The very next shot shows the blender toppled, but very clean. There is no trace of the chunky stuff in the blender or on the counter.
Continuity mistake: Towards the end of the movie when Chaz and the band are rebelling on stage and wrecking all the equipment, there are a few shots where you can clearly see that Brendan Fraser is only pretending to smash his guitar. (01:26:20)