From Justin To Kelly (2003)

Continuity mistake: During the dance sequence for "That's the Way (I Like It)" Kelly's shoes change twice: at the beginning she is wearing open-toed black shoes, then she is wearing sneakers for about two seconds, then back to the open-toed shoes and finally to the sneakers for the remainder of the scene. (01:13:25)

Continuity mistake: When the girls are leaving the beach, Alexa receives the first text message from Justin. They show her phone up close, and you can see her phone doesn't have a antenna. When she puts her phone back in her purse, her phone does have an antenna.

Continuity mistake: During the dance scene on the beach, at the beginning of the movie, Kelly is holding a ball in one shot, then in the next she is not, and then she is holding the ball again, all before they throw the balls in the air.

Alexa: I tried my hardest to keep y'all apart, you just kept gettin' back together... and I'm the queen of connivin'.

Alexa: You're interested in Kelly?
Justin: Yeah.
Alexa: You're the mayor of Spring Break, and she's one-bonnet-shy-Amish.

Justin: Hey, you're the girl from the beach.
Kelly: My friends call me Kelly for short.