public static void popularity(Long id) {
        Brand brand = Brand.findById(id);
        notFoundIfNull(brand);
        List<Outfit> outfits = Outfit.listByBrand(brand.id);
        Map<Long, Integer> counter = new HashMap<Long, Integer>();
        int view = 0;
        for (Outfit outfit : outfits) {
            incrementValue(counter, outfit.contact.id);
            view += outfit.view;
        }
        List sorted = sortByValue(counter);
        int i = 0;
        List<Contact> contacts = new ArrayList<Contact>();
        for (Iterator it = sorted.iterator(); i < 15 && it.hasNext();) {
            i++;
            Map.Entry entry = (Map.Entry)it.next();
            Contact contact = Contact.findById((Long) entry.getKey());
            contacts.add(contact);
        }
        brand.bestOutfiter = contacts;
        brand.view = view;
        brand.score = (view * outfits.size() / 2);
        brand.update();
    }