Christie Brinkley, 68, looks astonishingly youthful in her skinny jeans

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Christie Brinkley looked youthful in her skinny jeans on Monday.The 68-year-old Vacation actress was dressed for fall with a plaid jacket over a yellow sweater as she walked to a vintage red-and-white truck outside her Hamptons, New York home.'Keep on Trucking,' the model wrote in her caption. 'But remember what this season is all about Love and joy, peace on earth, goodwill, giving, hope, good cheer, understanding, helping, togetherness.' Looks 30s, not 60s: Christie Brinkley looked youthful in her skinny jeans on Monday.

The 68-year-old Vacation actress was dressed for fall with a plaid jacket over a yellow sweater as she walked to a vintage red-and-white truck outside her Hamptons, New York homeThe ex-wife of Billy Joel added, 'If we can practice these tenets that make up the spirit of these holidays and take them with us into the new year…the world will be a better safer and happier place.'Brinkley seems to have maintained her youthful good looks even as she is deep into her sixties.

In May she talked about how she stays so young looking.'When you eat too much at 68, it’s not as easy to lose the weight, so here’s a tip that’s tried and true, that will make you feel like your best you,' said the model.

A wonderful look: She could pass for a graduate student with her cross body brown purse and matching short boots She said to 'avoid the sugar and do exercise, it’s not about the size of your thighs.'The blonde also said, 'Vibrant good health will be your prize!' On Instagram stories, the mother of three revealed to followers exactly what she eats to stay in such spectacular shape.