Supermodel Heidi Kulm, who has posed wearing only multi-coloured make-up for a cosmetic advertisement, says she is happiest when naked.

The 38-year-old, face of Astor, an European cosmetics company, wore only make-up on her body for the advertisement, reports dailystar.co.uk.

"I am a nudist. I have never had a problem with my body," she told allure.com.

Klum has been the face of cosmetics brand Astor for more than two years, stripped off for a sultry campaign in her latest venture for the make-up brand and showed her ex-husband Seal what he’s missing out on.

The supermodel can be seen lying in a seductive pose, wearing nothing but body paint.

With a figure like that, it was no surprise that the 38-year-old star wanted to show it off, as she proudly posted the photo to her Twitter account.

"I had another fun photo shoot for Astor celebrating color!" the Daily mail quoted her as captioning the image on Twitter.

No doubt the sexy snap will also be showing the model’s estranged husband Seal what he is missing.

She certainly hasn’t been shy of showing off her body since the break up and also recently posed nude for Allure magazine.

In an accompanying interview with the publication, the TV host opened up about her split from the ‘Kiss From A Rose’ singer, describing the end of her marriage as a "curveball".

The pair split in January after seven years of marriage and Klum is still figuring out how to adjust to the changes in her life.