By Charlotte Tutton EastEnders is lining up some big celebrations later this month, but the party will descend into “chaos”. New spoilers teasing the big party for Whitney Dean and Zack Hudson’s joint stag and hen do have revealed a “shock event” will spark drama. During what should be a fun time for the couple and their friends and family, something happens that certainly brings trouble. Bosses are keeping quiet on what exactly happens, instead teasing that things do not go smoothly and that “a shock event” happens. Chaos will apparently erupt and dampen the celebrations, and fans will no dou…