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Christie Brinkley

Sonia Moskowitz/Getty Images

Christie Brinkley is proving, once again, that age is nothing but a number.

The 59-year-old blond beauty was all smiles while attending the 38th Annual Hampton Classic Horse Show in Bridgehampton, N.Y., over the weekend.

And why shouldn't she be grinning?

Decked out in a white dress paired with suede boots and a straw hat, Brinkley no doubt looked just as good—if not better—than many gals far younger.

Of course, this news doesn't come as a complete shock.

Back in June, Brinkley showed off her fit figure in a sexy swimsuit spread in Haute Living New York.

And just last month, she shared some Instagram photos taken during a recent family vacation in which her beautiful bod could been seen in blue shorts and a bikini top.