Korea spent the 10s beating America at their own pop game, supplying supercharged boy bands and girl groups with shiny maximalist anthems that keep more components in motion than a microprocessor. This chapter could be a textbook for aspiring producers - here’s a perfect key change on “Expect,” here’s how to give every vocalist a showcase without crowding the track on “Lucifer.” A couple killer J-pop cuts make the set too; the head-snapping “Gimme Chocolate!” confirms that heavy metal and girl-group pop have more or less the same energy.