Christie Brinkley stepped out in The Hamptons on Friday, and if you didn't k**w any better, you would probably think the gorgeous gal on her arm was her sister. But the stunning 62-year-old, who recently split from John Mellencamp, was actually spending quality time with her daughter, 18-year-old Sailor. The two were all smiles on Friday while attending the Chefs & Champagne For Elephants event at The Baker House 1650 in East Hampton. And while the mother-daughter duo are beautiful in their own right, we couldn't help but be reminded of a**ther supermodel and her look-alike daughter: Cindy Crawford and Kaia Gerber. Seriously, is something in the water in Hollywood? To get more of Christie's family, check out the Italian vacation they took together last Summer.