A lot of popstars didn't. It doesn't mean they're not supporting. Xtina has dedicated her CAREER to being a feminist and was doing it before her peers were. She's donated countless amounts of money to charities, has participated in several events, was very vocal about her support for Hillary as a female presidential candidate, and is consistently involved in several causes for women and NOT just when she has an album out like SOME of these girls. She doesn't have to be at the protest. She's already been protesting.

She is not in touch with things that are relevant except maybe the Kardashians.

They are going to complain that women aren't getting enough help and finance to have abortions.