Targeted Promotion Needed

We are in need of web promotion for our Girl Empowerment Community. We are a girls only site with features similar to myspace and youtube. We are also a production company that produces girl themed webseries. We are looking to generate quality traffic from myspace, facebook and bebo. We are looking to target American girls ages 13-25. If you have previous experience with this sort of promotion then please pm us. In your pm please tell us how many girls you can target, how you plan on "spreading the word" and what was your previous experience.