Are shaved heads in??

So this summer I saw or met multiple girls with their heads shaved. Not like bald but like Natalie Portman. Is this in now? I mean you have to be a special person to pull this off. I can sort of understand if your a missionary and are taking bucket showers, I mean I feel your pain. But your sort of limited. I'm just wondering if this is totally in and I didn't get the memo.