J.Lo wore her hair in her signature 90s style – half-up half-down on smooth, voluminous, blow-dried lengths. Secured with a silky black bow, Hailey Bieber celebrated her 25th birthday with a ...

For a half-up style, choosing between a bun or ponytail can change the whole vibe. "A high, sleek pony [like Lana's] gives that lifted snatched feel," says Thompson, "while twisting the half-up part ...