ANSWER:
That’s really a very weird and shameful trend!
No woman who has a little bit of shyness in her would ever do that and no man in his right mind would do such a stupid thing.
And moreover a female must not be filmed nor photographed, let alone post her selfies in such a shameful way on social media! The Prophet salla Allahu alaihi wa sallam had said: whoever imitates a people, he will be among them.