Deliberate mistake: In the beginning Chris and Jaime are on the bed talking and she is excited about graduating she is wearing a mini dress. In the shot where she falls face down in his lap and her dress goes up, she's wearing black tights underneath her dress, which are not there in any other shot.
Just Friends (2005)
1 deliberate mistake - chronological order
Directed by: Roger Kumble
Starring: Ryan Reynolds, Anna Faris, Amy Smart, Chris Klein
Other mistake: When Chris and Jamie are sitting on Jamie's bed, Tim comes in and shoves Chris onto the floor. This is supposed to be when the yearbooks are switched, but if you watch closely you will notice that Tim leaves with the same yearbook he brought in. (00:03:50)
Mike: You'll always be fat to me.
Trivia: Ryan Reynolds' fat makeup took 4 hours to apply.