Ryan Seacrest was about 16-years-old when his new girlfriend, model Shayna Taylor, was born.

That means he was cruising around in a car with his high school friends when she was getting her diaper changed.

Twenty-three years later, the pair are gallivanting in Saint Tropez, France because, ya know, he's a millionaire and they can.

Anyway, Shayna is a really beautiful girl who posts insightful photos like this:

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But we'll give it to her — girl looks good in a bikini:

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It appears Shayna could be the one for Ry guy, who just this week revealed he wants to settle down.

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Ryan and Shayna in Portofino on Aug. 20 (Photo Credit: Splash)

"I look at what my mom and dad have had for 40-plus years — a fantastic relationship and great marriage," he told People. "Someday I'd like that. They're my role models."

Just like the American Idol host, these 12 famous fellas can't get enough of the ladies — who are young enough to be their daughters! Scroll through below: