Comfortable heels might seem like an oxymoron in every sense of the word. For many (um, guilty), sky-high stilettos are often the source of aching arches, sore ankles, and blisters. But if there's any one group of people who possess the most knowledge on the subject, it's celebrity stylists whose livelihood hinges on a star being able to confidently stride down the red carpet with ease (while looking ridiculously good). After years of test-driving every kind of brand and style, stylists know which ones to use and which to stay away from. Of course, there are a whole host of variables to take into consideration, but each stylist has a preferred shoe that makes good on both comfort and style. We asked four celebrity stylists which brands are the most comfortable.