Supermodel Heidi Klum revealed she wouldn't let her kids hug her before the Oscars - because she didn't want string cheese all over her dress. The German beauty looked stunning in a red Galliano dress that is being auctioned off for charity on the interent. But she was determined not to let her children - including three-year-old daughter Leni - mess it up ahead of the ceremony. Heidi said: "I had to hold them a little bit because Leni was eating string cheese and I was like, 'No, no, no, I cannot have string cheese fingerprints all over me before we do this red carpet.'" Singer husband Seal said: "I had the string cheese hug instead." Heidi is auctioning off her dress on http://www.mycokerewards.com to raise money for a heart disease campaign. http://nz.entertainment.yahoo.com/080225/6/460r.html