Continuity mistake: During the beach party, when Mandy Moore's character is singing, her friends, who are supposed to be her backup singers, don't sing along with her. They somehow manage to sing the whole song without moving their mouths.
The Princess Diaries (2001)
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Directed by: Garry Marshall
Starring: Anne Hathaway, Julie Andrews, Mandy Moore, Hector Elizondo, Heather Matarazzo
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Trivia: In the scene where Mia slips and falls on the bleachers, Anne Hathaway actually did fall. The director thought it was so funny that he decided to leave it in there. Notice how Mia and Lilly fall out of character and start laughing, but in the next shot they're immediately serious again as if nothing happened.
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Chosen answer: Mia tells her grandmother that she has a 1966 Ford Mustang.
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