Plot hole: Kevin and Marcus's plan is flawed because, if Kevin had to "valet" park the car and he used it to drive Denise to the house he would have to: drop her off, return the car as Kevin, and somehow change into the girl disguise on. Unless he dropped off the car with the girl disguise on, it would be impossible to do that unless he brought a bag with him. Also he would have to somehow travel to the club and get there before Marcus. (01:04:00)
Plot hole: Kevin and Marcus are supposed to be bringing Brittany and Tiffany to the hotel in the Hamptons. But they get into a car crash on the way and have to stop somewhere else. When at the stop, they tell the girls to stay in the hotel and they become the girls. The problem, when they get to the hotel dressed as the girls, the two men (Marcus and Kevin) are supposed to do the hand off to the FBI agents at the hotel. But they aren't even there because they are dressed up as the girls. How does the FBI go the entire movie without once contacting them and especially, how do the FBI agents accept the girls without the correct handoff from Kevin and Marcus?