This site is a wonderful concept created and actively maintained by Kristin Kreuk (of Smallville) and Kendra Voth targeted towards girls 14-19 it is (quote)"a PLACE where YOUNG WOMEN can come together from around the WORLD to EXPLORE, EXPRESS, CREATE and realize their potential together."
http://www.girlsbydesign.com/
The website is still in the works but until then you can join the facebook group which is very fun and active:
http://www.facebook.com/group.php?gid=7980531822
Also be sure to sign up for their newsletter which will be sent to your inbox with news and fun messages from Kristin and Kendra