In the past if you wanted to look at what your favorite celebrities were doing you would have to wait for a one a month magazine to hit the shelves, or you would have to wait for an awards show to come on so you could get a glimpse of what everyone was wearing. While you may not be able to spend the same amount on your fashion as the stars, you'll have some basic pictures to go off of, and you'll be able to recreate the look with clothing that is more affordable but achieves the same look.
With fashion trends changing all the time, you may not really know where to start or what to consider when you want to buy new pieces of clothing for your wardrobe. You can look at what your favorite celebrities are wearing, or even look at what those celebrities that are built like you are wearing so that you can choose the most flattering styles for you.
No one is better at knowing what is "in" than the celebrities.