Emily Ratajkowski, Ashley Graham and Chrissy Teigen are among a growing number of celebs posting social media pictures of themselves breastfeeding their children — riding a new online trend called the “brelfie.” And while some celebrate the stars for normalizing the public nursing of children, some uptight observers can’t help but shame them for showcasing the perfectly natural act.Rihanna, 35, shared the revealing snaps on the Savage X Fenty Instagram account yesterday — the “Work” singer was breastfeeding her first son with A$ap Rocky, 1-year-old RZA, while wearing one of her Savage X Maternity bras. The chanteuse and business mogul is currently pregnant with her second child.