Continuity mistake: When the girls are knocking on the "Wilson sisters' (the Copeland brothers in disguise) hotel door for the slumber party, Karen is holding a stack of magazines, and "Cosmopolitan" is on top. When one of the "sisters" opens the door, the magazine on top is now "Self." (00:48:40)
Revealing mistake: When Marcus (dressed up as Tiffany) is braiding Karen's hair, you can easily tell that the corn-rows were already done, and that the hair that is not done is a wig. You can see the line where the wig starts. Also, it's probably a wig because when Marcus (as Tiffany) is braiding the hair, he just looks like he is moving it, and that the braids are already done. (00:49:25)
Continuity mistake: When Brittany fights with the strippers, in the background there is a table with a blue plate, a phone and a lamp on it. But when Brittany throws one stripper into the table, the lamp has been moved to the floor for the stunt. (00:52:00)
Continuity mistake: When Kevin (as Brittany) is beating up the male strippers, he throws one guy onto an end table and the whole table collapses. In the shots following, we see the table only partially collapsed. (00:54:20)
Continuity mistake: During the scene when Kevin and Marcus (as the sisters) go to the beach, you can see that the sunlight changes during the shots. In some shots, it looks like the weather is clear and in others it looks like it's a bit cloudy. (00:55:10)
Continuity mistake: When "Tiffany" lays on the beach, you can see a magazine laying on the towels beside her. Then when it cuts to a closeup, the magazine is gone and now there is a blue shirt with a mobile laying on top and a blue and white towel has also appeared. (00:55:20)
Factual error: When Latrell is in the car singing to one of the Wilson sisters, you can see the steam from his breath. This is supposed to be taking place on Labor Day weekend, which is the first part of September. I doubt it would be that cold at night. (01:03:25)
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)
Continuity mistake: When Kevin and Denise walk into Latrell's home, Denise has her shawl on both shoulders, but right when the lights flick on, her shoulders are suddenly uncovered. (01:07:10)
Revealing mistake: When the dog is dragging Kevin by the leg, you can see the padding underneath the pants leg. (01:09:50)
Continuity mistake: Right before Marcus (as Tiffany) unbuttons his pants at the dinner table, the waiter can be seen taking away the wine glass in front of Latrell. In the next shot, the wine glass is back on the table. (01:10:30)
Continuity mistake: In the Discotheque scene where Marlon and Latrell just drank their drinks (with the drugs), one of the cocktail glasses switch from being half full to empty between shots. (01:14:15)
Other mistake: When Gomez and Harper find Marcus and Kevin's masks, the masks are shown with lips attached. Whenever we see shots of the guys putting on the masks, there aren't any lips attached; they put their own lips through a hole. (01:15:00)
Continuity mistake: At the disco, Latrell puts drugs into Tiffany's drink. Tiffany finds out and switches the drinks around. When she did this, the "drug" drink was still in front of her. In the next shot, it is in front of Latrell. (01:16:35)
Continuity mistake: When Busy Phillips is vomiting in the Disco-Tech bathroom the women in the background change positions between shots and then just disappear altogether. (01:22:00)
Continuity mistake: When Marcus's wife comes to the hotel, his lipstick becomes much more evident when he answers the door than it was seconds before when he was talking to Kevin. (01:25:30)
Continuity mistake: In the scene where Agent Harper and his partner bring the real Wilson sisters to the chief because they think they are the fake sisters, Agent Harper pulls down one of the girls shirts. Before the shirt is pulled down almost all of the girls hair is behind her shoulders, but when it shows her from the back all of her hair is over her shoulders. (01:29:25)
Continuity mistake: When Aubrey tells Heather and Megan that they aren't in the fashion show, Megan offers him sex for it. He lights a cigar in his mouth. When it cuts from close-up to wide shot, the cigar moves from his mouth to his hand, beside his leg. (01:33:55)
Other mistake: When Marcus and Kevin reveal their real identities to the crowd, their eye colour changes from blue to brown without any indication that they removed their contact lenses. They simply lift off their masks. (01:38:10)
Continuity mistake: The red paint dropped on the catwalk disappears when the dragon is about to come out, but later it is back, and a lot thicker, when the chief walks out. (01:40:50 - 01:45:35)
Answer: I think the song you mean is "Get Low" by Lil' Jon and da eastside boyz.
Latin Thugs Cypress Hill.