Stretch marks are one of those beauty concerns that tend to stick around long after pregnancy or weight fluctuations. And while no cream can perform miracles overnight, some solutions are standing out - including one Hailey Bieber just shared on her Instagram Story. The model and new mom revealed that TriLASTIN Intensive Stretch Mark Cream is one of her can't-live-without post-baby essentials. @haileybieber Designed to target both new and old stretch marks, this cream is packed with collagen-boosting ingredients that help restore skin elasticity in as little as one month.