Well lets see sparkcity world is a virtual world for girls only.
try www.barbiegirls.com
Yes, there is. www.barbiegirls.com I will let you know if I find anymore... I hope this helps
Well you can try Frenzoo, it's not only for girls but there are a lot of girls, you can dress your avatar in the last fashion and join fun contests!
You can try Smallworlds.
there issmallworldsmovie star planethowseweeworld
Try girlsense.com
fun websites are for girls are imvu.com stardoll.com nick.com bearville.com moviestarplanet.com
i-dressup stardoll fantage weeworld
Well I know a few virtual worlds that don't need email. Like Howrse.com, ponyisland.net, and moviestarplanet.com.
Girlgamezone is a games website for girls, focused on virtual games, 3d, Sims, and virtual worlds and games arcade.
Barbiegirls.com fantage.com (For boys and girls) goSupermodel.com Zwinkycuties.com And many more!