Oh, ha ha!
I've heard it's cack and hippy-happy pop music is not my bag at all so I avoid it. Fair play to her, she's trying to do something useful with herself, if enough dingbats can be found to pay her to do it, fair enough.
How sick and twisted do you have to be to send death threats to a teenager who's not actually done anything that offensive to anyone? Some fucked-in-the-head nutcase thinks it would be a right good laugh to scare the shit out of some kid who's probably not handling all the attention that well.
Oh and the PR firm, I don't believe she's that talented and quite a few people agree with me, so let her have her 15 mins, then she can go off to college and get on with her life without you fucking up her life for good!