With a mega-successful cosmetics debut under her belt, rumor has it that global-pop-icon-turned-business-mogul Rihanna is setting her sights on lingerie. WWD first reported that the Barbadian “Wild Thoughts” hitmaker is rumored to be a year deep into collaborating with TechStyle Group—the company behind Kate Hudson’s Fabletics brand and others—to launch a new intimates line, with…