Kourtney Kardashian and Travis Barkerchanneling Sid and Nancy — got an early start, festivities really kicked off on Friday, Oct. 29.One epic Halloween look that people couldn't get enough of was John Legend and Chrissy Teigen's transforming into the Addams Family with their own brood.Legend, dressed as Gomez, played the classic tune on the piano as he was accompanied by Teigen as Morticia, Luna as Wednesday and Vilailuck «Pepper» Teigen as Grandmama.