Celebrity Halloween Costume Pictures 2011 Including Kim Kardashian and Heidi Klum

It's Halloween today, and Hollywood has been celebrating the spooky holiday all weekend. There were plenty of elaborate costumes at parties from NYC to Las Vegas including Heidi Klum's skin and bones bodysuit and Scott Disick's priestly getup. AnnaLynne McCord and her sisters wore matching looks and Kim Kardashian channelled Poison Ivy. Click through to see all the stars in costume this year so far!