I want to know the Name of A Movie that has this theme?

I saw this movie when I was 10 years old and I'm 17.So I don't
remember the Title..
It about 5 or 6 girls How make a Pact with the Devil that when they
Group up the would be the most successful Woman alife .. I think It
they were Witches Or something like that. and It takes place in a All
girl school ( i Think) It's all I remember And i Really Want to Know
the Title so please Help...