Heidi Klum dished on how she keeps her skin looking so radiant, and it's definitely not what we would have expected. We've never understood how the 40-year-old Project Runway host has kept her skin so flawless, until now!

No, the mother of four didn’t find the fountain of youth. But she did dig up something else in the search for a gorgeous complexion: dirt. While taking her most recent Instagram selfie, the statuesque blonde gave her nearly 700,000 followers a sneak peek at how she keeps her skin silky and smooth.

Heidi Klum Beauty Secrets Who said getting down and dirty was a bad thing?

“Facial time,” the German babe captioned the photo, along with a winking emoticon. In the picture we see the runway model sporting beige clay on her perfectly chiseled face while a towel protects her golden locks from getting muddy.

According to reports, Klum’s day of relaxation came in the nick of time: The dedicated mom had been up to her neck in wrapping paper for nearly seven months! "I start [getting Christmas gifts ready] in the summer!" Klum told E! News of her pre-Christmas preparations. "I start everything early. I'm a planner. You have to be organized. I have lists — pages and pages of lists." Talk about pressure! Good thing Klum’s secret soil weapon keeps her from looking stressed. 

Are you surprised Klum gets down and dirty during her beauty regime? Lets us know your favorite unconventional beauty trick in the comments section below!