***ImagePlaceholder*** http://cdn-img.instyle.com/sites/default/files/styles/684xflex/public/images/2017/07/072117-queen-elizabeth_0.jpg?itok=lH595vXc Queen Elizabeth will have you know that royal life isn't always as cushy as it might seem. In a preview for an upcoming documentary about her coronation, the British monarch reflects on the momentous day more than 60 years ago—including one aspect that wasn't so great. …