 CONT: At the start of the movie when Jamie and Chris are at her  graduation party and they are in her room, when Jamie first jumps on  the bed she is rolling around and you can see her underwear. About a  minute later she is tickling Chris and leans down towards his  abdomen, and her butt is in the air towards the camera, you can  clearly see she has on black shorts underneath her dress. Then  another minute later she leans over again and there are no shorts!