== Plot ==
Princess Rosalinda María Montoya Fioré ([[Demi Lovato]]) is about to be crowned queen of the small nation of Costa Luna. General Magnus Kane ([[Johnny Ray (comedian)|Johnny Ray Rodriguez]]), the dictator of neighboring country, Costa Estrella, invades her palace with his agents during her coronation rehearsal, and attempts to capture the royal family and take over the country. Major Joe Mason ([[Tom Verica]]), an agent of the Princess Protection Program, or the P.P.P., a secret organization funded by royal families that looks after endangered princesses, whisks her away to safety via helicopter. Kane's agents, however, succeed in capturing her widowed mother, Queen Sofía Fioré of Costa Luna.
The Princess Protection Program hides Rosalinda in Joe's home in Lake Monroe, [[Louisiana]], where she meets his teenage daughter, Carter Mason ([[Selena Gomez]]). Carter is an insecure tomboy who works at the family bait shop and dreams of going to the homecoming dance with her crush, Donny ([[Robert Adamson (actor)|Robert Adamson]]), although her classmate, Ed ([[Nicholas Braun]]), secretly has a crush on her. Rosalinda poses as "Rosie Gonzalez", Carter's cousin from Iowa. Though Carter initially treats her with hostility, she warms up to her after Rosie explains her situation, and the two become best friends. Carter teaches Rosie to act like the average American teenager, and Rosie shows Carter how to disarm those that scorn them, especially resident mean girls, Chelsea Barnes ([[Jamie Chung]]) and Brooke Angels (Samantha Droke). Rosie soon becomes popular at their high school.
In an attempt to trick Rosalinda into exposing her ___location, General Kane announces plans to forcibly marry her mother. Brooke discovers the truth about Rosie and threatens to expose her unless Rosie drops out of the vote for Homecoming Queen. Rosie reads of the pending nuptials in the magazine and tells Carter that she has decided to return home. Knowing Costa Luna is still too dangerous, Carter secretly devises a plan to pose as Rosalinda and use herself as bait to lure Kane into capture. Carter calls Mr. Elegante, Rosalinda's royal dressmaker and friend, for help with her plan. He tells Kane that Rosalinda will be attending the homecoming dance and plans to wear a Caribbean blue dress - he actually sends the blue dress to Carter, and gives Rosie a pale pink one. In the meantime, Rosie agrees to stay for the dance.
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