Stars like Saweetie and Demi Lovato are shaving their head for fun.
Jada Pinkett Smith -- who's always rocked short hair -- has no choice.
The oversharer from a family of oversharers has shaved down to the scalp.
Jada has the autoimmune disorder alopecia, which causes hair loss and balding.
“So it just showed up like that and this is going to be a little bit more difficult for me to hide,” she said. “So I thought I’d just share it so y’all are not asking any questions."