Perhaps Rhianna decided awhile ago to work smarter and not harder. Being a pop girl is a LOT of work and you're always at someone else's disposal. By deepening her ventures into fashion, she can forego all that recording on a deadline, dieting, costume design, set list creation, rehearsal, seemingly endless interviews/promotion, and the rigors/expense of touring. She can design when the inspiration hits, promote as SHE sees fit, and make ancillary money (like this book) off of the various outputs - and make just as much, if not more, money. And as a benefit (because of today's industry), she can also grow anticipation for another record without being forced to. The small gamble is that her music audience may have moved on, but "so what" since she has so many other streams of revenue/relevance. We shall see....