Continuity mistake: When Jamie goes to the graveyard, Landon gets out of the car to catch up to her. When he catches her by surprise, her ponytail stays behind her back. When they show her again, Jamie's ponytail is draped over her shoulders. When they show her one final time, it's behind her back again.
Continuity mistake: At the beginning when the kids go to the plant to jump into the water, as they walk away from the cars, the lights on the Camaro are on. When they run back, they are off.
Continuity mistake: When Jamie and Landon first go to the graveyard to look at the stars, Jamie's face is pale. In the next shot she has makeup on.
Continuity mistake: In the scene after the play when Landon's father tries to talk to him, a man walks past them in a green shirt. In the next shot, the same man walks down the stairs behind Landon and his dad in the same green shirt.
Continuity mistake: When Jamie is singing in the play, her hair is down and goes from all/most of it over her shoulder to all behind her shoulders. This switches on and off.
Audio problem: When Jamie is looking through the telescope Landon built for her, the second time she says, "Come here. Come look. Quick," is looped because her lips are hardly moving.
Continuity mistake: In the scene were Mandy is singing "Only Hope", if you watch both shots of her face when the camera is transitioning between shots, you can see that she closes and opens her eyes at different times. Her face movements are also different throughout the scene when the camera angles change.
Continuity mistake: After the first tutoring session as the students are going home on the bus, you can see the bus is driving in a residential neighborhood. After Jamie walks away from Landon, you can see the bus from an aerial view with trees on both sides and not a house in sight.
Continuity mistake: When Landon goes to visit Clay in the rehab center, as he's walking in it's a bright sunny day. But once he enters the room, the weather through the window is dark and dreary.
Continuity mistake: When Mandy Moore is singing in the play, the clasp on her necklace keeps moving - in one shot, it's visible, in the next it's not, then it's near her collarbone... all over the place!
Continuity mistake: After Landon gives Jamie the pink sweater, he talks to his mother while she rips up a piece of lettuce for a salad. In one part, she starts to tear up a big piece, and when she is around halfway done, the scene cuts to in front of Landon and she is just throwing the last bits in.
Continuity mistake: When Landon walks up to Jamie and asks for help, Jamie closes her locker but doesn't lock it, yet the lock is firmly in place when they walk away.
Revealing mistake: The makeup artists tried to make Mandy Moore (Jamie) paler for the movie, but they neglected everything but her face. In the star registry scene, notice how tan Jamie's legs are compared to her face. In the scene where she is sleeping on Landon's shoulder, you can see how tan her shoulder is compared to her face where as Landon pulls her sweater back over her shoulder.
Revealing mistake: During the play where Sally walks out on Landon's character in the club, you can see Mandy eyeing Shane and smiling under her hood as if they weren't filming anymore.
Plot hole: When Landon tells Jamie "In your dreams", as he and his friends are walking off, Landon and his ex-girlfriend are walking arm in arm to class. This is after Belinda invites Landon into her house and he tells her that its over. In the commentary with the actors and director, Shane West says that he and Belinda thought the cameras were off.
Continuity mistake: During the play, Mandy begins to sing the song "Only Hope", and sits down at the table beside Shane West. You can clearly see a small layer of her hair hanging in front of her right eye. A moment later, when the camera angle switches from the back of her head, to her face again, the piece of her hair is gone.
Continuity mistake: When Belinda says "nice sweater" to Jamie, Jamie has a backpack on and when all of Landon`s friends are laughing it shows Jamie walking away and she doesn't have a backpack on.
Continuity mistake: During the scene when Jamie is humiliated in the cafeteria with the flyers, the flyer that Landon holds up has a girl with a bathing suit and Jamie's head. But the flyers on the table show the girl completely naked with Jamie's head on it. On the DVD commentary with Shane West, Mandy Moore, and the director, they say that they had to CG a bikini on the one picture because of the rating of the movie.
Other mistake: On Landon and Jamie's first date, they are dancing. When the camera backs away and is going to go onto the next scene, you can see that Landon and Jamie are standing there, barely moving, and laughing. Mandy Moore confirmed later that they were wondering whether the scene was over or not and wondering whether they could stop dancing.
Continuity mistake: When Landon and Jamie are looking at the stars together, and he tells her he had a star named for her. A couple of seconds later she takes the paper showing the coordinates of the star and starts to sit down. The camera angle changes and shows her still in motion to sit down, but now the paper is nowhere to be seen.