Kendall Jenner sticks out her tongue while flaunting her flat tummy with pal Hailey Baldwin.br br They're top models and the best of friends.br So it was no surprise that Kendall Jenner and Hailey Baldwin were side-by-side Saturday night in New York City, where they spotted leaving Milk Studios together.br The IMG repped model, 22, made a sour face - sticking her tongue out and grimacing - as she and her blonde bestie, 21, headed to a party hosted by Poppy Delevingne.