Bindi Irwin is letting the world know that she's not a little girl anymore. The 16-year-old, who is about to turn 17 on July 24, posted a beautiful black-and-white selfie on Instagram on June 2 looking more grown up than ever. Bindi captioned the photo with a heartfelt message for her followers, saying, "To be beautiful means to be yourself. You don't need to be accepted by others. You need to accept yourself. 'What you do, the way you think, makes you beautiful.' - S. Westerfeld." And Bindi, who is still the spitting image of her late father, Steve Irwin, who passed away in 2006 after a sting ray accident, isn't the only celebrity kid who is morphing into her parents. Cindy Crawford recently shared a photo of her look-alike daughter, Kaia. See Bindi's photo below, then check out even more kids who are nearly identical to their famous mums.