I am looking for the title of a movie, the plot: a girl is making a movie of people in her town, a girl in the neighbourhood starts helping her with this project, the main character finds ths not needed assistant annoying, but allows her to help her, she is unaware that her assistant is dying from cancer, they eventually develop a friendship
The end scene is the showing of the movie with the girl who dies of cancer talking about making a difference in the world.

The Sisterhood of the Traveling Pants (http://en.wikipedia.org/wiki/The_Sisterhood_of_the_Traveling_Pants_%28film%29)