With help from a pond-hopping lineup of U.K. garage and dance music experts—shout out AlunaGeorge, Pete Tong, MNEK, Gorgon City and, especially, Todd Edwards—I trace the lineage of English underground music all the way to the upper reaches of Billboard Hot 100, from Kyla & Crazy Cousinz to Disclosure to Drake to that place where all roads eventually lead: Justin Bieber. This is part three in a highly interactive, very wide-ranging British Invasion-type series I dreamt up (story-wise) for Slate underwritten by Jaguar. See the food and design pieces too.