Yet another 'song?' thread

I'm looking for the song that plays an hour and 25 minutes into the movie; it's instrumental and in the scene the girls are holding hands, walking to school and are about to taunt that girl who left the group.

It also plays on the main menu on the DVD.

I don't know if it's a song used or part of the movie score but I'd like to find it - or at least find the name of it.

Thank you in advance!