Mel Vogue nude photos - 🧡 Heidi Klum and Mel B in 'naked' selfie after America's Got Talent

Not convinced that age really is just a number? The 39-year-old teamed it with black sandals and while her raven locks were slicked back, Heidi wore her blonde tresses flowing to one side.

With smokey eye makeup and blonde hair tumbling down her shoulders, Celine is inarguably a knockout -- but it's her fit figure that steals the show.

Covered only by her own arms and legs, the intimate backstage snapshot shows a completely naked Celine between outfit changes for a recent show.

It was followed by their debut album, Spice, which has sold more than 28 million copies worldwide, becoming the best-selling album by a female group in music history.