Continuity mistake: In the scene where White She Devil is pursuing Undercover Brother on a motorbike, her helmet changes from one without a visor when the shot is a close-up her face, to a different helmet with a visor when the shot is from further away.
Continuity mistake: When Sistah Girl sneaks into Undercover Brother's apartment, she pushes a gun into his fro. But from a different angle, it's a few inches away from the fro.
Other mistake: When Undercover Brother is being tested for his knowledge of the white man's culture, he's asked (something along the lines of) "on 'Friends' in season 3, Ross sees something of Julia's that makes him feel bad for kissing Rachel the night before." It was Julie, and the second season.
Plot hole: Shortly before the penultimate fight between Feathers and UB, Smart Brother comments that UB has a few seconds before the reactor goes. Yet, no matter how loosely SB's words are interpreted, the whole sequence from when he said that to when it blew lasted longer than "a few seconds".
Revealing mistake: In the scene where UB breaks into Feather office you can see a mark on the door where he is supposed to kick in order to break it.
Visible crew/equipment: Throughout this entire movie, it is possible to see the sound recording equipment above. (00:58:55)
Revealing mistake: Just after the B.R.O.T.H.E.R.H.O.O.D. discover who UB is, it cuts to UB in his apartment, apparently having a kung-fu moment. As he jumps backwards into the wall, it wobbles quite badly (as do the parts mounted to it) - obviously just a piece of free-standing plasterboard. (00:09:25)
Audio problem: When UB is running through the things that have been done by "The Man", in the Chief's office (ie. NBA 3-point shot, Spike Lee), after UB says "So the entertainment industry really is out to get Spike Lee", he says "Is that right?" but if you watch UB's mouth, he is not saying this line.
Revealing mistake: When the white guy is smashing one of the bad guys' head and green blood is coming down, you can see the pipes that shoot it into the head.
Continuity mistake: In the scene where UCB first arrives at "The Brotherhood" the medallion he is wearing changes three times: a lion fang, a small gold disc, and finally when Chubby Brother is showing UCB the modifications to his car the large disc with the fist raised that his father gave him.
Continuity mistake: When Undercover Brother is getting fed the sandwich by White She Devil, the excess mayonnaise drips down onto Undercover Brother. When they get up from the couch, the mayonnaise is nowhere in sight.
Continuity mistake: In the scene where Lance is checking the B.R.O.T.H.E.R.H.O.O.D.'s boss' blood pressure, the cuff is on the boss' arm, then after a quick shot away to someone else the cuff is off his arm, too quickly as the boss and Lance don't appear to have moved.
Answer: "Here We Go" by the boy band, NSYNC.
CCARNI