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)
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: 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: Agent Harper's earpiece disappears in one shot and reappears in the next shot when he is checking the fake Wilson sisters into the hotel. (00:21:00)
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)
Revealing mistake: When one of the 'Wilson' sisters leaves with Latrell for their date (after he starts singing to her), the car they get into is supposed to be valet delivered just before they step into it, yet when it pulls away there is a visible dry spot on the road beneath it. Clearly the car had been parked on that spot for long enough that the heat from the engine dried the wet pavement underneath it, which would take far longer than the length of one song.
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 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)
Continuity mistake: When Kevin and Denise are having a glass of wine at Latrell's house, the wine glass goes from her right hand to her left hand and then she is empty-handed.
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)
Continuity mistake: When Kevin and Marcus are talking to the other two agents, their positions change. When they are shown from the front, they are standing right next to each other. When they are shown from behind, the is a least a foot between them.
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: 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: After Karen (Busy Phillips) tells off a longtime crush-turned-jerk, "Tiffany" (Marlon Wayans) comforts her. Tiffany puts (his) hands on the sides of Karen's neck and tells her a little line about "guys not seeing the beautiful thing right in front of them," or something to that effect. Watch the shots here carefully - facing Karen, Tiffany's hands are on both sides of Karen's neck. From the shot behind Karen, however, one of Tiffany's hands is on her shoulder. Both hands are back on her neck in the next shot.
Continuity mistake: Given how long it takes to air brush all exposed skin that's not a prosthetic (neck, hands, arms, etc.) it would not have been possible for Marcus and Kevin to apply their makeup in any amount of a reasonable time when their friends show up for the slumber party.
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: When the thief steals the handbag, Kevin has black heels on. She then goes to barefoot when chasing him, then in one shot she has white trainers on, and is then back to barefoot when she catches the man. (00:40:00 - 00:41:05)
Continuity mistake: After the real drug dealers enter the bodega, the lid on the ice cream container behind Kevin and Marcus goes from being off to on between shots. (00:05:10)
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)
Continuity mistake: When Tiffany/Marcus is in the bathroom after eating the quiche his underwear goes back and forth from near his ankles to up on his thighs between shots. (00:31:25)
Answer: I think the song you mean is "Get Low" by Lil' Jon and da eastside boyz.
Latin Thugs Cypress Hill.