By definition, celebrities are under constant scrutiny from the media           and the fans that adore or hate them. For a public figure, looks  is extremely          important and contributes to the growth or drop in  popularity.
Celebrity fashion is a perfect occasion for media coverage and a source           of profit for designers and other fashion oriented industries.  Attaching          a famous (popular) face to a line of clothing,  perfumes or accessories          will boost or ruin sales. Some of these  celebrities have unique fashion          touches that can become easily  identifiable and adopted by the masses.          Celebrity fashion is  so influential because it springs from the fans’          adulation of  the fame status.
The person asserts  himself/herself as a fashion icon through little details:           Nicole Kidman through her vintage brooches, Dita von Teese through her           classic ‘50s dresses and pale skin, Jackie Kennedy through her  chic          fawn coats and pillbox hats, Jennifer Aniston through her  silky hair,          Jennifer Lopez through her furs and oversized hats,  Beyonce through her          sparkly, asymmetrically small outfits.  Each of them inspires a certain          style that will be adopted by  those who enjoy it.

In the last years  celebrity fashion took a step further, increasing in          popularity  and availability. Stars have created their personal lines of           clothing, reflecting their personal style. Such are Jennifer Lopez,  Sarah          Jessica Parker, Ashley and Mary-Kate Olsen, supermodel  Kate Moss, singer          Gwen Stefani, Victoria Beckham and many  others. Each has more or less          accessible fashion items. For  example Victoria Beckham designed jeans          from very luxurious  Japanese denim that retail at $280. At the other end,          Sarah  Jessica Parker’s line, called “Bitten”, is specifically          made to  be widely accessible, with items that do not cross $20 and come           in sizes from 0 to 22.
Realizing the importance of a famous face attached to a product,  important          companies like Coca-Cola, Nike, Apple or L’Oreal  convinced stars          to endorse their products - because celebrities  vouching for the quality          of an item will influence the  customer’s behavior.
It all adds up to the phenomenon of celebrity fashion that directly  affects          the public’s choices. By association with the beauty,  artistic talents,          fame and social impact celebrities and  personalities have, people will          tend to imitate and adopt.