How can I get movie stars or fashion models to wear the clothing items
I am designing out in public to create demand for the item?

Some of the information in this answer might be of interest to you:

http://www.answers.google.com/answers/threadview?id=416839

Have you thought of contacting photographers and models to set up a
calendar shoot or a pamphlet and giving some of your clothing to the
models as compensation.  You can also give some of your clothing to
the photographers as compensation and they can use them as props for
future shoots.  Check out sites like
www.icouldbeamodel.com/rate/index2.php to find models and
photographers willing to help you.