When Jake first goes to the bowling alley to hear McFly rehearse, McFly and Jake talk about giving the CD to Phillips. After Jake goes to clean the toilet McFly resume their song. Danny Jones' voice can be heard singing harmony with Tom Fletcher, but he is nowhere near his microphone in the shot.
At the Hard Rock Cafe, when Harry Judd goes missing and Jake tells the boys to go look for him and they start running around yelling "Harry", Danny Jones is holding the wrong eye from where Dougie Poynter hit him with the bass string.
When the girls are getting ready for the McFly concert at the Hard Rock Café, the mirror that Ashley broke with the blow dryer is not broken anymore, but when Ashley gets closer to it the mirror is broken again but in the wrong spot.
When Ashley leaves the bowling alley (after opening her umbrella inside the building) and talks to Jake, who is standing outside his limo, Jake is dry at one point, the shot switches to Ashley, back to Josh, who is now wet, back to Ashley, then back to Jake, who is dry again.
Right after Ashley broke the mirror with the hair dryer and she is sitting next to the sink, her hair is completely dry and styled even though she didn't even start drying her hair yet and it had not been enough time for it to dry on its own.
When the three are eating and talking about how lucky Ashley is (just before the masquerade bash), the colors of Maggie's headband switch back and forth between shots. Sometimes the blue/green side is in the front, but sometimes the purple side is in the front.
When Ashley is at the art exhibition, the strap on her eye patch shifts up and down on her forehead (sometimes the strap is just touching her right eyebrow; sometimes it creeps up about an inch or so higher).
When Ashley is in the restaurant, she takes a customer's bacon, which she stuffs in her mouth, she then pulls her hands away and says "I'm like a coyote", she has a piece of bacon on her right hand, when the camera goes back to her, the bacon is missing.
During the laundry room scene, the amount of water and suds on Jake's shirt changes. While turning off the water it is obvious that his sleeve is soaked but in the next shot when he begins talking his shirt is practically dry. A few seconds later its spotted with water again.
When Ashley is at the restaurant, and is grabbing the bacon off the customer's plate, the french fries on his plate are in a different spot with no ketchup, when she puts the bacon down, they are moved and there is ketchup on them.
When Ashley is talking to Antonio in her apartment and he's on the other side,his position changes between shots. In one shot he moves away from the door and when Ashley calls out to him again in the next shot he's near the door and in the next shot he's again in his previous position.
In the masquerade bash when Ashley runs into Peggy and Antonio by Madame Z's tent Peggy is wearing a light brown lipstick shade (rather a nude shade) but when the police arrest her, her lips are smeared with red lipstick.
Backstage, when Damon Phillips reminds Jake Hardin that Phillips had told him "not to play that song," the film is backwards. Phillips shakes hands with his left hand and the stripes in his tie go down and to the right instead of down and to the left.
Flipped shot. Backstage, when Damon Phillips of McFly reminds Jake Hardin that Phillips had told him "not to play that song," Phillips shakes hands with his left hand and the stripes in his tie go down and to the right instead of down and to the left.
The goof item below may give away important plot points.
After the McFly Concert when they are all celebrating, Jake calls for Danny to come over to him but Danny Jones was previously shown right beside him and they then cut to Dougie Poynter walking over to Jake.
When Ashley gets her luck back near the end of the movie and she goes home, she opens her coat and shows Dana and Maggie her dress, and then closes it. But in the next shot when it shows it from behind her, she closes it again.