Stop press. Famous woman shaves head. If she shaved her pubes and armpits we'd be a lot less excited about it. There's something rather irrational about getting excited about something so irrelevant to those not intent on rigorous gender boundaries. It's a lot like Man Wears Dress. So what.
Your favourite blogstress Cru had her head shaved a few years back and I can tell you that it met with the following reactions:
95% Oh my god, that's fantastic, you look amazing, can I rub it?
5% How are you finding the chemo? You don't? Why did you do it then?
And just in case anyone doesn't believe I really did it - here's me and my friend Roy, in Tokyo circa 2001: