Honestly, I was a bit disappointed that she did that to her butt because she was always the one saying that we are who we are and we do not have to be ashamed or let people ashaming us. Strong ideas. Strong words.
But, at the end, I really do not care about her butt, what she is doing to her face, or her veiny hands. The most important is that she likes how she is. Then, my opinion does not matter.
I love her for her music, for her lyrics. What she wants to do in her private life does not concern me.