OK I found 3 mistakes and there all in the scene where Katie and James left the Cuban club and are in the car. Mistake #1 if you look closely at Katie's dress,before James ripped it it was already ripped!!!Mistake #2 after James ripped her dress and Katie was getting out of the car, look at the strap and it wasn't ripped at all!!! Mistake #3 James locked the door so Katie couldn't get out and when she left the car he didn't unlock the car door!!!Oops