"You want to know what comes between me and my Calvins? Nothing."

That one statement helped launch Brooke Shields to superstardom and made Calvin Klein the incredibly successful global brand it is today.

Shields was only 15 when she started working for the company and would later go on to star in films, a very popular TV show and even appeared on Broadway. Not too shabby for a former teen model.

Today, Shields celebrates her 48th birthday and she still looks pretty great!

But how have other former CK models aged through the years?

Click the gallery above to see how the brand's underwear hunks like Mark Wahlberg, Travis Fimmel and Marcus Schenkenberg have changed -- plus supermodels like Kate Moss and Christy Turlington!

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