Hailey Bieber’s baby is starting their modeling journey quite young — while still in mommy’s belly! The brunette bombshell hasn’t skipped a beat since announcing her pregnancy last month, as she’s participated in numerous modeling campaigns for her brand, Rhode Skin, as well as a recent partnership with Saint Laurent. In honor of the company’s new pocket blush launch, Rhode shared behind-the-scenes photos of a campaign shoot done ahead of the makeup product’s release. The photos featured the star — who is expecting her first child with husband Justin Bieber — and her adorable baby bump peeking…