When Kris walks in on the ballerinas, the ballerina in red has her hair down to her shoulders and pulled back. When Judy leaves the room, the ballerina in red has curly, shorter, different-colored hair.
When Judy walks towards Kris and Bosley there's a hot pink cloth sticking out of her handbag; it is from Rose's outfit. When Kris points out to Rose's wig, the hot pink cloth is then gone from her bag and reappears after the camera has cut to Kris. Kris couldn't have seen Rose's wig as it wasn't in view when she pointed it out, nor was the hot pink cloth.
Freddie refers to the guy throwing the party as "Sweet Larry" but in the end credits he's credited as Big Larry.
When Tiffany and Kelly leave the conservatory to head to Georgia's Hamburgers the camera/crew are reflected in the glass on the door.
Judy and her father's last name is Harkins but the name of their school is written as "Harkin's". The correct spelling would be either Harkins or Harkins'.