Factual error: In the movie, prom happens during the end of the film. The movie spans the length of a week, yet we see that Jessica's boyfriend in the movie (Matthew Lawrence) is still having football practice. The high school football season ends months before prom. If it was supposed to suggest they are having spring practice, then he's not even supposed to be practising since he's a senior.
Continuity mistake: In the scene where all the "Hot Chicks" are at the dance club 'Instant Tang' and Rob as Jessica is dancing with Beonca, and he rips her shirt then everyone else rips their girlfriend's shirts, look closely at the girl behind Rob with the kinda white shirt, after it's ripped it goes back to Rob then back to her and her shirt is all back together again, then it's ripped again.
Continuity mistake: Before the switch, in the scene where Jessica is trying to get the drinks for free at the mall, she licks the whipped cream off the top. In the first shot there is whipped cream on one side of her top lip. In the next shot it is on the other side and is much smaller. Then the next shot is the same as the first.