Name of the movie please!!

So I can barely remember bc I watched it a looooong time ago. 

There was a girl and she had braces (I'm not sure if she was a new student). She starts hanging out with a group of girls (bad girls I think?) and in recess they went to kiss some guys, and the main character was kinda struggling bc of the braces.

I know that's basically nothing but if someone knows which movie is I'd be really really grateful <3