Beauty Marked (S02E12)

Sam is filled with disdain for the "Miss Teenage Happy Princess" beauty pageant and its organizer, Dora Mattingly, as it arrives at Casper High. To make a statement about individuality, she decides to enter the contest but uncovers a shocking secret: Dora is actually the Dragon Ghost! Just as she begins to investigate further, she is unexpectedly crowned Miss Teenage Happy Princess by the overly cheerful judge, Danny Fenton. Upon receiving the tiara, Sam is magically whisked away to a castle in the Ghost Zone, where she learns she's destined to marry Dora's ghostly brother, Prince Aragon. Meanwhile, Danny and Tucker venture into the Ghost Zone to rescue her as she tries to disrupt the medieval ghost world.