Use showmanship, make a stunt in public that's going to capture people's attention(Pt Barnum)
Give people an outstanding offer the first time they see you, like two clothes for 1, Make a press release. Create a video on youtube with models wearing your clothes, doing some funny things. (Make it look like they are not models, but just average people who are having fun.) Put some emotion into the movie. And then call to action, tell people to go to your websites if they want to finally start dressing themselves like a goddess, etc...
Vey important. Your advertisement must have a unique angle, why do people have to wear your clothes? What makes your product so unique they simply must have it? What it is the concept of your business that separates you from everybody else?
You got to be able to answer that question before you do any advertising.
1. Study great advertising. Cause your ability to succed with your business really comes down to your ability to sell.
A good book I'd recommend if you want to learn how to sell is:
Robert Colliers Letter Book.