Her enthusiasm makes sense (today is the first day of spring). But you definitely have to do a bit of royal guesswork to notice that her kids are also featured in the post celebrating the new season.

In one Instagram pic, Rihanna showcases her first moments of motherhood, holding RZA Athelston Mayers, now 2, skin-to-skin, while wearing pearl and gold necklaces. In a second photo, a selfie ...