I'm trying to find the title of an older movie with a young proper blonde headed girl who sings america the beautiful at a fair ground type area in the beginning of the movie and I believe she falls out of a tree and cripples herself when she tried to sneak out.

Pollyanna starring Hayley Mills
http://www.imdb.com/title/tt0054195/

This is a video of the fair and the part where she sings
http://www.youtube.com/watch?v=CWCm4B21qy4

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Happy Holidays!