The engaged duo made a quick pitstop at Fat Burger on Monday before jumping into their silver Lamborghini and heading to pastor Chad Veach's Los Angeles home, where Hailey let her maternal instincts kick in.
Before they even got inside the house, Hailey had her hands on the baby. Holding the newborn high in the sky, the model looked in absolute awe.
Let's not forget, Bieber was recently snapped in NYC holding a fan's toddler too.
But before we get all excited with Bieber/Baldwin baby fever, remember, we've seen this pattern with Biebs before ... right before he and Selena Gomez pumped the brakes on their relationship, they were spotted going gaga over children left and right.