I don't know where I stand with the sex book tbh. Some might disagree with my statement below but I welcome constructive criticism!
I believe she was acting out, rebelling, angry. In time, even she would hint that she went overboard to the point that it became distraction to her music, and people's perception of it, and her. She could have told us all day about how she didn't care what people thought, but I think she did. She has always been a narcissist (in a self absorbed way) but it was clearly out of control during this time.