My friend hacked me facebook, I want revenge?

Ok, one of my friends and I were having a little spam war last night by spamming each others walls on facebook, you know, just for fun. I totally beat her in spamming. And then, today, she took it a little too far by hacking my facebook account, and I don't know how she did it. And what's more, it she changed the email so it's set to her email, so now facebook sent the new password that i changed it to to HER email as well as mine, and I don't know how to delete her email. So, in short, I'm screwed. Is there ANY way I can get back at her by hacking her facebook, because now I know that there's a way, I just don't know how. If you don't know, how can I just get some REALLY good revenge on her because I'm pretty f*cking angry at her right now... Pleaseeee help me!!!!