in order to be succed in one thing, be pretty is not enough.. Instead of that, u have to be different, special, variate..
Look at Carrie in Sex&the City - Mr. Big finally went for her because among millions of pretty young girl in NYC, Carrie is the one of only girl that makes him laugh. She is special.
Being a public icon, say personal stylist, is the same - u have to be different. Different enough that ppl will take your advice seriously over others'.
All in all, personal image - show that you are differentiate from the rest is the key..
So how?
Of course, any individual is different from each other. Just develop the parts that others may not have then become essential. Find your niche, make it better.