Gigi Hadid and Zayn Malik have welcomed their first child, a baby girl.The One Direction stand-out announced the birth in a touching social media post on Wednesday, calling their precious gift 'healthy and beautiful.''Our baby girl is here, healthy & beautiful' the 27-year-old Pillowtalk singer wrote along with a black and white photo of his heavily tattooed hand holding on to his and the 25-year-old supermodel's pride and joy.'To try put into words how i am feeling right now would be an impossible task.