"White Feminist" does not refer to your skin color or race. It refers to a kind of feminism that seems good, but is really only exclusive to the interests of certain women. Its exclusive instead of inclusive, and its often based on western perspectives that may not be applicable elsewhere. They use their feminism to promote "female empowerment!" but then are silent or even backwards on the specific issues facing black women, queer women, muslim women, etc.
Ariana actually does speak out about these things of her own free will from what I have seen, so she is not a white feminist.
It's also associated with a kind of general commercialization of feminism and rigged adherence to liberal feminism (if a woman makes a choice, its feminism! /s)
(Also, isn't Ariana Italian?
I'm not sure if she reads as necessarily "white" to all people, esp. with her tan; some people think shes hispanic for example)
