Here is a 21-year-old version of "The Simple Life" star rocking her go-to pink sweatsuit while accessorizing with her beloved pup, Tinkerbell, back in 2003 (left).

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And, more than two decades later the hot mama proved she's aging like a fine wine, recently showcasing her ever-lasting beauty at The World Cup (right).

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We know her legendary phrase "That's Hot" will never age-out, but the question here is:

Good Genes or Good Docs?! VOTE NOW!

Paris Hilton ...

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