Katharine McPhee has never looked happier! Two months after the Smashalum, 36, welcomed her first child with husband David Foster, 71, she took to Instagram to share a series of photos, giving fans a glimpse inside her postpartum life. In one snap, she cradled her newborn son Rennie, and gave him a kiss on the head. The American Idol alum rocked a leopard print skirt and an Anine Bing sweater that featured Terry O’Neill‘s iconic photo of Kate Moss on it.