Continuity mistake: In episode 52, "The Princess and the Partridge", keep an eye on the woman seated behind the Princess at the concert. In some shots she is wearing a necklace and seated beside a younger man; in others, she has no necklace and is seated beside an older man. (00:21:55)
Continuity mistake: When they are in the bus on the way to record an album, Shirley is wearing a pale blue turtleneck with a scarf. Suddenly she has a hat on and then they cut back to her again and she is wearing something navy blue with a white collar. Then she is wearing a pale blue turtleneck with a scarf again.
Continuity mistake: At the end Laurie is in the kitchen with her mom and Keith. She tells Keith the boyfriends of the girls who were chasing him are at the door. Her hair is down. Keith runs out of the door and she hollers after him. When they cut back her hair is in a ponytail.
Audio problem: In the final song, "This is What It's Like to Be Lovers", the lead male studio singer starts the song, not David Cassidy, then they switch to David Cassidy's real voice halfway through for just two lines, then they switch back to the male voice of the studio singer.