Continuity mistake: In the scene in which Roxie shoots her lover, he looks into her mirror whilst putting on his tie. He ties it, then puts down his collar. He turns away from the mirror and there's a shot of his back. His collar is up again. (00:09:15)
Continuity mistake: During the Cell Block Tango, 'Pop' dances with her partner while she sings. When she says "not chewing, popping!", she turns her head sharply and some of her hair lands on her partners hat. When she says, "You pop that gum," she moves and the hair falls off, but in the close up, it is on his hat again in the same position. (00:24:15)
Continuity mistake: At Roxie's trial when Billy is examining Amos and talking about Roxie's baby, during the close-ups of Amos, the camera goes to Billy when he's asking a question and Amos when he's answering a question. When Billy is ranting about Amos not even asking Roxie if he was the father, during the shots of Amos, Billy is MUCH closer to the witness stand than when the camera goes to his shots. (01:22:55)
Continuity mistake: In the final scene when Velma and Roxie are performing, there is lipstick on Roxie's teeth. In the next shot it has disappeared. (01:41:35)
Continuity mistake: In the final scene where Roxie and Velma are dancing in the concert hall, Roxie is on the right and Velma is on the left. They then turn around, and from behind (same point of view as before) they're suddenly the other way around. (01:44:20)
Continuity mistake: After Roxie shoots Fred Casely, a photographer takes a picture of the body and in the flash from the camera, you can see Fred's eyes are closed and his head is facing straight up. After Roxie's 'Funny Honey' number, the attorney interrogates her and uncovers the body for a neighbor to identify it. When he does this, you can see that Fred's eyes are open and his head is tilted to the side. (02:10:24)
Continuity mistake: When Roxie is about to fire Billy, there is a close-up of her telling him off, and you can see some loose blonde hairs falling out of her hairstyle. In the next close-up they are gone, and in the next one they're back again.
Continuity mistake: When Velma is dancing and singing for Roxie after making her the offer to replace her sister, during the first half she has an obvious run in her right stocking and a hole about the size of a quarter over her knee. When she tells Roxie the second half is better and finishes her number, the run has disappeared.
Continuity mistake: At the very start of the Nowadays/Hot Honey Rag Medley Title song, where both Velma and Roxie are facing away from the audience, Velma's arm changes position between shots, from being at her side, to on her hip, and back to her side again.
Continuity mistake: In the scene near the end where Roxy is auditioning she gets off the stage and there is a cleaner in the background sweeping. In the next shot the cleaner is right back where he started.
Continuity mistake: Just before Kitty Baxter shoots the 2nd woman sleeping with her husband, she gets a 2-handed grip on the gun. But in the next shot, she is holding the gun 1-handed and once again gets a 2-handed grip.
Continuity mistake: Near the end of the movie, after Roxie's audition, Velma is pitching her act again when Roxie puts on her coat and buttons it. The camera cuts back to Velma for a minute, then when it cuts back to Roxie her coat is unbuttoned, then seconds later she is walking through a door and her coat is buttoned again.
Continuity mistake: In Roxie's first press conference, in certain shots you can see a bit of misting. In others you don't. This suggests that the scene was shot over several days or at different times of the day.