Continuity mistake: After Santa marries Carol and kisses her, he puts his right hand on Charlie's arm. In the next shot, Santa's arm is down.
Continuity mistake: When Toy Santa sits at the desk, objects on the desk change around between shots. Most noticeably, the reading glasses (which he picks up for a moment and sets them down) are at an angle, then turned so the lenses face the camera.
Answer: The actress dancing to "Everybody Loves Christmas" is Elizabeth Mitchell, who plays Mrs. Claus/Principal Newman.
wizard_of_gore ★