Audio/visual unsynchronized: As Key (Anthony Anderson) visits DJay (Terrence Howard) in jail, DJay's mouth movements reflected on the glass partition do not match the words that he is saying.
Continuity: In the room when DJay first plays his keyboard, the dirt pattern on the door behind him changes drastically when the scene changes.
Incorrectly regarded as goofs: Clyde is in the shop buying batteries for his microphones. The microphones we see later are Shure studio microphones that do not use batteries. Batteries are very rarely used in studio microphones. However, it is possible that he was purchasing batteries for microphones used in his other endeavors such as wireless microphones or even the deposition microphones we see later in the film.
Continuity: When Djay is recording "It's Hard out here for a Pimp," Nola's hands jump to her headphones between shots.
Continuity: After DJay buys the keyboard from the bum at the beginning, he is holding a paper bag in his right hand and the keyboard in his left. However, when he goes to play the keyboard, the bag is gone.
Continuity: During the scenes where they are laying down the track for his song, DJAY's hair is slicked back in the recording studio and then messy when he is told to go outside and then slicked back again when he returns to the studio.
Continuity: When Shelby is laying down the piano loop for "Whoop that Trick", he is shown first playing it in the middle of the keyboard, but in the next shot, the position of his hand has changed to the bottom of the keyboard, while the notes stay the same.
Factual errors: At the beginning when DJ turns on the radio, the music being played is explicit and uncensored. If it was being played on the radio, it would be censored to make it radio-friendly.