I agree, it's not blonde, it's a light brown. After her cancer diagnosis and treatment, I feel she can do whatever she wants and the "critics" online can go jump. To me, it's different and Catherine wanted a different look. I think it's all her real hair, after chemo, people's hair grows back absolutely thick and beautiful. It's an odd "side effect." I've seen it happen to a lot of people I know who had chemo.....my late mother's hair was thin and afterwards her hair was gorgeous.
Maybe Catherine will do what I did, after light brown, go to auburn. I've been a auburn girl for several years and everyone likes it, no complaints.