Kim Kardashian, Heidi Klum and More Get Into the Halloween Spirit Kim Kardashian tried on an incredibly sexy cat outfit while shopping for Halloween costumes Oct. 13. Rawwwr!!! Halloween Costume shopping," the reality star tweeted alongside a photo of the sheer outfit. In 2011, the 31-year-old star rocked a sexy version of the Batman villain Poison Ivy. Twitter/KimKardashian