Cindy Crawford [1] is indisputably one of the world's most beautiful women, so to ring in her 50th birthday on Saturday, she posted a makeup-free selfie. Cindy looks refreshed and gorgeous in the Instagram photo [2], with no sign of worrying about her age. "First day at 50," she captioned the snap. "Thank you for all of the birthday wishes yesterday! 💋•" The supermodel celebrated her birthday by jetting off to St. Barts with husband Rande Gerber [3], where it looks like the bathing-suit-clad duo had a ton of fun. Keep scrolling to see more photos from her birthday weekend, then check out other celebrities who've embraced the art of the makeup-free selfie [4]!