Heidi Klum Painted Bikini Secret  2/14/06

Supermodel Heidi Klum became a spray-paint canvas for her saucy 1950s-inspired shoot for the new Sports Illustrated Swimsuit Issue magazine. 

The German stunner appears to be wearing four different period bikini outfits in the sexy shots, but, upon closer inspection, Klum is naked - and wearing just paint. Klum is thrilled with the shoot but admits the four shots she posed for took a lot of work. 

She explains, "To do actually only four shots, it takes four days - you can only do one picture a day because it takes 10 or 11 hours to paint it one."