ACertainShadeofGreen

Other mistake: 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.

ACertainShadeofGreen

Continuity mistake: 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.

ACertainShadeofGreen

Continuity mistake: 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. (00:02:10)

ACertainShadeofGreen

Continuity mistake: 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.

ACertainShadeofGreen

Continuity mistake: When Rhonda tells Fiona that she is going to find a place to put her six dollar pedicure, she puts her hand on the counter. In the next shot (from the back), her hand is down by her side.

ACertainShadeofGreen

Audio problem: When the twins are practising in the house pool, Brianna farts and you can hear her say "whoopsie", but her mouth doesn't move. (00:07:10)

ACertainShadeofGreen