Hailey Bieber appeared to hint she was pregnant during a moment with her husband Justin Bieber at the New York Met Gala event on Monday evening.The 24 year old beauty chose a black strapless plunge gown for this year’s event and the bust was encrusted with diamond, which matched Hailey's stunning sparkling necklace.The couple oozed glamour in their elegant outfits as they walked along the red carpet and when they posed for photos, Justin, 27, moved his hand to cradle wife Hailey’s stomach.