This time, she's sharing some advice for new moms: no drastic hair changes for a year postpartum. After welcoming her first child Jack Blues Bieber ... who referenced Bieber's short bob as haircut ...

Now a mother to one, baby son Jack Blues, it goes without saying ... face is subconsciously pushing her to chop her hair into a chic, short cut, but also about how she's sure she's going to ...