Continuity mistake: When Mark is editing his film at the end of the movie, there is a segment of Angel when he was singing "Today 4 U," Mark never filmed during that scene. At no point during Angel's performance does Mark pick up his camera and film Angel. We see Mark without his camera just watching Angel. (00:26:50 - 01:54:55)
Continuity mistake: When Samantha is sitting at the foot of the bed with an ice pack on her head, eating toothpaste, in one shot she spits some toothpaste out and it goes over Chris' hand. In the next shot his hand is clean. (00:36:55)
Continuity mistake: After Perry and Harry leave the lake with the girl in the trunk, the headrests are missing from the front seats, but when the shot cuts to them arriving at Harry's hotel, they reappear.
Continuity mistake: When Minty arrives at the North Pole in a balloon, she passes Santa's house twice.