If I had the fan base, I'd try to bring the flames to multiple genres too. Maybe she got bored of doing what's typically expected of her and wanted to do something new.
That's one of the cons of social media. Everyone has an opinion they want to share and even the shytty ones end up in the echo chamber. Doesn't mean everyone else has to pay attention to it. Good part is that it gives the person being talked about more publicity and promotion. If it's good then it's good and that's the bottom line