Continuity: When Carter is splashed as the twins jump into the pool, only one side of his head/hair is wet. In the next shot, all of his hair is wet.

Visible crew/equipment: At the pool, when Sam brings the salmon plate to Fiona, just as she rushes down the stairs, the shadow of the boom mic and pole is seen moving from right to left, along the grass.

Continuity: When Austin is walking down the school halls with his friends, putting up fliers, his hair is considerably shorter than the following shots, such as when he goes to the diner and talks to Sam.

Continuity: When Sam is taking batting practice during school, she hits a ball at Carter's feet. If you look at the way she hits the ball, she pops it up. Then the very next pitch she check swings and crushes the ball to Austin Ames.

Continuity: In scene four when Sam is sitting on the friendship circle you can see that her legs are crossed the entire time. When she texts Austin you see her legs and they are not crossed. In the shots before and after this one her legs are crossed.

Plot hole: During the pep rally scene, when Shelby is staging the play, Gabriella comes out wearing a bridal gown. A couple of seconds later, she comes out wearing the "diner girl" outfit, complete with roller skates. There was not enough time for her to change so quickly.

Continuity: When Austin is typing to Sam near the middle of the movie, the very first book on the shelf in the background keeps changing.

Continuity: At the beginning of the movie when the younger version of Sam is blowing out her candles, the amount of ice cream in the cup next to her changes within seconds.

Continuity: When Austin is putting up the "Have you seen Cinderella?" fliers, in one shot he puts up a flier on the lower left side of another flier, but in the following shots, the flier is up near the center, then to the right, and then back near the center again.

Continuity: At Rhonda's house, when Sam says, "You sure do have a knack for taking something simple and making it beautiful," the red bowl is beside her. After Rhonda shows Sam the white gown, the camera pans back toward the table top and the lace mask suddenly and deliberately appears and is leaning against the bowl.

Continuity: During Sam and Austin's dancing outdoors, Sam's hand shifts. In one shot it is completely over his shoulder and in the next shot it is on his shoulder. We see her hand the entire time so there is no time for her to move it without seeing it.

Other: When Sam is texting Austin, she gets the reply the split second after she sends her text. There isn't enough time for Austin to read the text and reply.

Continuity: When Sam is running away from Austin at the dance, the bottom of her dress is very dirty, it's almost black. When she runs inside and runs up the stairs, her dress is white again. This is confirmed on the commentary.

Continuity: When Brianna and Gabriella are in the car wash, they get covered in soap suds. When they fall on top of the car, they are noticeably drier.

Audio problem: When the twins are practicing in the house pool, one of them farts and you can hear her say "whoopsie" but her mouth doesn't move.

Continuity: At the start of the pep rally, Mr. Ames takes a seat behind Austin in the close-up. Next shot facing the crowd, when Coach steps up to the stage, Austin's father is gone - his seat is empty, but a couple of shots later Mr. Ames is still there. Additionally, Sam and Carter are also gone in the crowd shot.

Continuity: After the twins enter the car wash, in the first shot when Gabriella walks through the vertical black cloth strips, with squeegee in hand, she is wearing the large hoop earrings. When it cuts to the next shot, as she shouts, "Bri?," her earrings are suddenly gone. This occurs before Brianna climbs onto Gabriella's shoulders.

Visible crew/equipment: During the football game, in his close-up when Austin shouts before the hike, "Down, set 28 guarding..." the large white reflector screen is reflected in his helmet.

Factual error: Toward the end of the movie just as Austin and his team start the football game, the camera shows the scoreboard counting down from 15:00 minutes, the problem with this is high school football games are played in 12:00 minute quarters not 15:00.

Audio problem: When Hilary Duff is Text Messaging her "Secret Admirer" the sounds of her pushing the phone's buttons don't match up with her fingers pushing the buttons.