You can see how the magic is done here, but, you also can refer back to his guide of how to draw ladies the Oda way.
Pikotaro’s PPAP Song got changed from “Pen Pineapple Apple Pen” to “Pen iPad Pro Apple Pencil,” got remixed by DJ/producer Yasutaka Nakata (a collaborator with Perfume, Kyary Pamyu Pamyu) and got set to putting those drawing tools to work on a very curvy Nami.