Heidi Klum is arguably the queen of Halloween costumes, so everyone is itching to know what she's going to wear this year, including Ellen DeGeneres. During the Halloween episode of The Ellen DeGeneres Show on Monday, the host tried her best to get the model to reveal some details. While the fashion designer kept mum on her actual outfit, she did reveal that it's made in Germany. "Maybe a Porsche?" the host asked a fairly coy Heidi. "Or a Mercedes. Are you going to be a car?" Let's just say, if anyone could pull it off, it would be her.