
If you can't talk her into continue living (which you should try), well... I don't know why she's doing it or anything, but...
I don't know what to say. Try to save her if you can, if you can't... you'll know better, I guess. Life is worth living. Even... with all the crap there might be.
Hang in there MP3. Please.
...This is probably the least helpful thing I've posted ever. >_< I seriously can't think of anything to say, but please, don't kill yourself. Don't. Please. Live. You can become a great singer like this Ariana Grande person you talk of and cheer up everyone with your singing and your talents could take you all around the world and you could be famous and have a nice big house and whatnot. Life is precious, it's valuable, good things happen, tell that to this girl, and if you can't, stay in her house for a while and take all the knives and pills and sharp objects and ropes and toasters and hide them from her. Or something. Talk to her family. To her friends. Freaking broadcast it. Get as many people as you can to help.
...I hope this helped at least one little bit... all I want to do is help you, MP3... but I don't know very well how...