Anachronisms: The Dreams' success montage includes a picture of the trio standing on the Great Wall of China. The U.S. had no diplomatic relations with China between 1949 and 1971.
Audio/visual unsynchronized: The lip-sync is off during some verses of "It's All Over" and "And I Am Telling You I'm Not Going".
Continuity: While adjusting her outfit backstage during the Detroit Theater Talent show, Effie is shown adjusting her wig. In the very next shot, it is perfectly in place.
Anachronisms: During a 1965 press conference, one of the photographers is shown taking pictures of the Dreams using a Nikon camera which was not sold until the late 1980s.
Anachronisms: When the 1962 Cadillac Deville Convertible is put up on the lift, you can see all-weather radial tires, which didn't exist then, with treads you would not have seen until the nineties.
Factual errors: During the success montage, the Dreams' "Dreamgirls" single is shown climbing up Billboard magazine's "Top LP's" albums chart, not its "Hot 100" singles chart.
Anachronisms: In a scene set in 1965, the Dreams and Curtis are shown working in the studio during the 12th Street riots in Detroit (identified as such by archival footage being used), which began on July 23, 1967.
Continuity: In the Dreams version of "One Night Only", the girls' capes fall to the floor during the opening bars. After the next shot, they disappearing.
Continuity: Just before the gospel break of the "Steppin' to the Bad Side" number, a medium shot of the Dreamettes features Deena on the left, Lorrell in the middle, and Effie on the right. The shot immediately following is a long shot showing the full stage, with Effie now on the left, Deena in the middle, and Lorrell on the right.
Incorrectly regarded as goofs: The sudden appearance of the tambourines during "Steppin' to the Bad Side", just before the gospel break, is not a continuity error, but an intentional and planned part of the choreography which employs an old stage/film musical technique.
Factual errors: When Effie goes to the welfare office, the American flag hanging vertically on the back wall is backwards. The flag should always be displayed so that the blue field is in the upper-left corner to the viewer.
Factual errors: In the montage the entry in the charts does not make sense. The song is No.1 and shows it as being No.8 the previous week, but yet it only shows it as being on the chart for 1 week which is impossible.
Continuity: During the "It's All Over/And I'm Telling You" scene Effie's wig is wider on the sides. But on many close-up insert shots the sides of the wig are tighter.