I'm not too worried about her...I mean, of course I'm concerned if she isn't 100% herself, but at age 13 and facing the absurd amount of work everyone's been doing to promote the latest single it's no surprise that she might feel a bit overwhelmed by everything that's going on. I think she's simply tired.
No matter what's going on with her, it's good to see people organizing projects to lift her spirits. If she is indeed feeling down then it's a good way to help her get back into things; if she's actually fine then hey, bonus present for her birthday! Plus it seems like she gets the least amount of hype and promotion out of the 9th gen girls so it's a good way to create some international buzz for her.