Page Six may be compensated and/or receive an affiliate commission if you click or buy through our links. Featured pricing is subject to change. Just call it a return to Form. When Hailey Bieber posted a series of selfies last week, we couldn’t help but notice she included a snap wearing a $68 V-Neck Bra from one of go-to workout brands, Form. For the ultimate high-low exercise outfit, she paired the tow-tone top with Aflalo Fine Jewelry Tennis Drop Earrings that ring in at $4,750. While her sports bra is still in stock for now (and a relative bargain), we predict it’ll fly off the shelves fast following Bieber’s endorsement. She’s a…