 This event is one of two events where the three major titles in the WWE (world, intercontinental and tag) all changed hands on the same night, the other being the 2009 edition of .SummerSlam is an annual pay-per-view, produced every August by World Wrestling Federation (WWF, now WWE) since 1988.Dubbed "The Biggest Party of the Summer," it is one of the promotion's original four pay-per-views, along with WrestleMania, Royal Rumble, and Survivor Series, dubbed the "Big Four".