When Lexy, Mr. Walker, and her friends are getting ready to go to the hotel and are walking down the street in their spy gear, Lexy's earpiece appears, disappears, and then reappears several times as the view shifts.
During the last scene when Lexi (Lohan) takes her friend's video camera and is using it, the shot clearly shows that the video camera in her hand is not on. The screen is black.