Gigi Hadid and Zayn Malik had reason to celebrate this week, as their baby girl turned two!The 27-year-old model addressed the occasion of daughter Khai's second birthday on Monday in her Instagram Story, offering a subtle shout-out to her musician ex by tagging him in the snap. «Our angel girl turned 2 today,» Hadid wrote, showcasing a brightly colored Peppa Pig cake by Carlo's Bakery. The former couple had dated on and off since late 2015, welcoming their only child in September of 2020.