Hailey Baldwin, 23, is not only a professional model, but a model for Justin Bieber’s Instagram as well. On Sept. 1, the bareMinerals ambassador happily posed in a yellow bikini featuring a bandeau top and high-rise bottoms as Justin, 26, snapped a photo for his Instagram Story. It appeared to be the same bikini that Hailey rocked in an Instagram post on Aug. 23 — check it out below!