Tyra shared a picture of her stunning bikini body via Instagram on Tuesday, Sept. 3. "#fierceyovacation continues with a #LayDownBootyTooch," she wrote alongside a picture of herself in a tiny black bikini while wearing sunglasses and laying outside on the beach. "Let's be real: My butt is SO much bigger than this. But this angle makes it look smaller. #DontLetTheAngleFoolYou," she added.