As we suffer/rejoice (delete on how you feel!) on the hottest day of the year, keeping cool but still looking good is a job in itself. However, the top knot not only happens to be one of the season’s most popular looks, it’s also the perfect way to keep cool. Amanda Holden and Leona Lewis are both fans of the style, which is easy to do but can look effective as well. Simply pulled back to the crown, it ensures hair is away from the nape of the neck, and can be left dishevelled a la Leona, or grecian-like, sported by Amanda. Perfect for a night out or lazing about at home.