Sandy Cheeks

Sandy Cheeks (portrayed by Carolyn Lawrence) plays quite a minor role in It's a SpongeBob Christmas! although her machine does find out the cure for Plankton's Jerktonium. She becomes a jerk during the episode, but SpongeBob sings the song, and cures her.

Trivia

 * SpongeBob hummed the tune the Christmas Magic Analyser gave and she was still cured of the Jerktonium. He sung the song later on and others were cured.