She traded her brunette locks for a fire-red wig and wore a short, elaborate green dress decorated with leaves for the occasion. And, of course, no sexy Halloween ensemble is complete without ultra high heels -- hers were sparkly nude pumps for this occasion.
Kardashian probably had a jacket on earlier in the evening as well, since it was snowing in NYC and all. She tweeted that the wintry weather caught her offguard: "Its snowing so hard in NYC! I was not prepared for this weather! Its so pretty though!"
She also explained how she chose the outfit (via Us magazine): "The party is obviously with Midori," she said. "So I wanted to wear something green and I thought, what really is there to wear green? There's Tinkerbell or a mermaid -- and I wanted to be Poison Ivy. I like the red hair idea."
