During the montage of the group's touring experiences, there is a shot of the adult Jermaine character riding on the plane. After this montage, the movie continues using the teenage Jermaine character.
When the boys are congratulating Tito on his engagement in the den Jermaine fixes some root beer floats. His float has not yet settled, but when he clicks his glass to Tito's it has settled. Then when he brings his glass back it is once again not settled.
When Jermaine arrives at the Jackson house to sign the CBS contract, he is shown driving up in his convertible, his hair is in a shorter, tighter afro. When he is shown inside the house, his afro is much longer.
When Katherine catches Joseph on the phone with his mistress, while listening in on the outside phone, he hears her hang up and she is suddenly there, in the house. There's no way she could have been back inside the house so quickly.
in the scene in which the kids are singing while cleaning the house Tito picks up and begins to play a guitar which is not given to him by his father until several scenes later
In the scene when the actor who plays Michael Jackson is doing his solo performance for Motown, the single, glittery glove he is wearing is on his right hand. In the actual performance, the real Michael Jackson is wearing the glove on his left hand.
Michael Jackson was born 29th August 1958 not 1959.
"I'll be there" was recorded by The Jackson 5 after "ABC" in 1970. "ABC" was actually first recorded in 1969 around the time of "I want you back."
Michael didn't have a cleft in his chin until the mid 1980s.
The Jackson 5's first single was "Big Boy", not "Kansas City."
During the high school talent show scene, the far away shots clearly show another child doubling for the character of Michael for the more elaborate dance moves.
While playing in the house as children, Tito, is playing an electric guitar, which can be heard amplified, even though it clearly isn't even plugged into anything.
During their performance at the Apollo, the strap on Jermaine Jackson's bass snaps off, nearly dropping the bass guitar. But since Michael Jackson's character is obviously the focus, this scene was never corrected.
When Michael is in the studio laying down the audio tracks for the song "Human Nature", the caption reads that the year is 1983. Human Nature was on the "Thriller" album, which had already been released in 1982.
When Jermaine and Hazel call Joeseph to tell him they're getting married, they're using a pay phone with push buttons. Jermaine married Hazel in 1973, push buttons on pay phones weren't widely used until the 1980's.
The movie is set in the 1960s and 1970s, but yet, young Jermaine is playing a bass guitar that was made in the 1980s.
When Katherine is holding her new baby and announces his name to be "Michael Joseph Jackson", the visual shows that she is actually saying something different.
When The Jackson 5 perform the song "Never Can Say Goodbye", the actor playing Michael pulls an obvious mistake in mouthing the song. In the chorus, he adds the word "baby" in a spot where it doesn't belong.
Alex Burrall's (Michael 6-8) lip-syncing is sometimes not in-sync with the audio.
When Jermaine meets Hazel after getting off the plane, Hazel's mouth movements don't match what she's saying.
When the Jackson 5 are practicing the song "Dancing Machine", the Michael Jackson character sings the wrong words as he is pantomiming. He mouths "move it baby", but the song says "do it baby".
When Joe and the Jacksons get robbed after the show, Jermain is shown beside Joe in one shot and then back by the steps in the next shots.