“Queen of Christmas” earlier this month to create the “McDonald’s Mariah Menu,” which features 12 days of free food deals for the festive season.On Tuesday morning, participating restaurants started giving out the “McDonalds x Mariah” shirts to the first 10,000 customers who ordered a Sausage McMuffin with Egg on the franchise’s mobile app.The black shirt only comes in one size (large) and features an image of Carey chowing down on a McDonald’s meal.The shirts will be shipped to the eligible