Heidi Klum uses chocolate-flavoured lip balm to satisfy her sweet cravings. The German supermodel often longs for chocolate cake from her homeland, but has discovered a secret weapon to curb her desires. She is quoted as saying: "I love chocolate. I have a chocolate lip gloss that tastes like a German chocolate cake. It is very good. It tastes so good that I constantly have to lick my lipstick off and re-apply." Heidi isn't the only supermodel who has confessed to secret cravings. Last year, Milla Jovovich revealed she embarked on a desperate search for bone marrow when she was pregnant with her daughter Ever Gabo. The Ukrainian-born beauty said: "I was craving bone marrow one day, and I scoured the whole of Paris searching for the leg of a cow. When I finally found what I was looking for, I cut it in half, digging out the yellowish substance, slathering it all over bread."