October may have only just begun, but Heidi Klum is already in the thick of Halloween planning. On Thursday, the supermodel posted a picture of her "first fitting" on Instagram. "What am I going to be this year?" She asked. "Can you guess !?!?!?!?!?!" There's not a whole lot to go off of; Heidi's wearing thigh-high boots and a tight, formfitting dress. It's hard to tell if the clothes are beige or white, mostly because of the filter. Needless to say, our expectations are pretty high. Last year's Jessica Rabbit costume involved a crazy 10-hour transformation, and there are many years of elaborate looks that precede it. So, what do you think? Any idea what we're in for this year?!