Serious babe alert!

Mark Wahlberg made them famous and Justin Bieber recently rocked them, but Calvin Klein underwear looks best on Hollywood hotties Gigi Hadid and Emily Ratajkowski!

The two models donned the undergarments to pose for sexy snapshots, and we can't decide who looks better, but the Gone Girl actress got a little racier by ditching her bra. We wouldn't be surprised if they got endorsement deals with the brand!