It's hard to believe Heidi Klum has aged a day since her early fresh-faced covers for the famed Sports Illustrated Swimsuit Issue, but the supermodel mom turns 39 today. In honor of the bombshell's birthday, we're celebrating with a look back at her sexiest editorials to date. Sure, "The Body" can carry a bikini like nobody's business, but the ageless Klum stuns in just about everything else, too. From beachy beauty to easy denim, click on to see just how versatile — and gorgeous! — the supermodel is in 25 of her best editorials.