How do i deal with a girl who hates me?

[Koi]

I'm an alternative model, as soon as this girl started dating my ex suddenly she was too, she's sabotaged my photoshoots, spread rumours and bitches about me constantly to everyone.
She pulls off the sad little girl act, and everyone now thinks I'm a bitch.
She even lied to my fiancee about stuff I had supposedly done, she reckoned i had threatened her, he called her out about it and said stop being a bitch as he had seen the message shr sent me on Facebook, SHE threatened ME! I never said a word

I don't know what to do, I find it funny, then it pisses me off again, she's been told to back off but she still bitches, and now she's copying the photoshoots that I do, what clothes I wear and the piercings I have.

She and my ex have even made fake profiles on Facebook to report my page and photos constantly, its got so far that I'm thinking about copyrighting my name, as she made hers similar until everyone said what the hell are you doing -.- I have an awesome photoshoot coming up, and I'm worried she'll copy that too!

Her: http://www.vampirefreaks.com/bekikuu
Me: http://www.facebook.com/sayurisybaritemodelpage

[?]

She looks scary and an absolute state.
You are much prettier if that helps.

Report her to Facebook, and whoever is in charge of your photo-shoots, but don't give her any attention yourself. I think she's jealous of you, and if that tarantula head came up to me looking like a sad little girl I really wouldn't buy it so don't worry I don't think people really believe her as much as you think, they're probably just scared of her.