I've been with a girl before who got a short hair cut that really didn't suit her and the same kind of awkward dilemma of not knowing how to admit that I don't find it attractive at all and is kind of a boner killer.
I didn't tell her, but gratefully I found that a lot of her friends told her how badly it looked. Maybe the same sort of thing will happen to your girlfriend -- if she doesn't look that good, society will probably let her know without requiring you to turn into a critic. Though, damn, it's going to take some time to go from completely bald to back to her usual self.
Wow, she has very stunning eyes and lips. It's certainly an edgy and bold look. I'm impressed by how daring she is! I get nervous simply cutting my hair shorter than my earlobes. It will look even better when she gets more of a tan where the hair used to be. I think she's amazing.
It looks nice on the girl in the pic, so if you're girlfriend is rocking it like that, good on her. However, I think it's a massive no-no to make such a drastic decision without first discussing it with your partner. Dick move there.
Its horrible bro, the first thing I would definitely say is WTF. But I am always straight up when it comes to hair, LONG hair only. Being a good boyfriend or at least trying I would sugar coat many things. This will be one instance I will absolutely not, I meeeeeaan WHAT DA FUQ!!!