Well since you're from the us, the first choice would have to be Forever 21 http://www.forever21.com/Product/Main.aspx?br=f21 They have great styles, and wonderful prices. A friend of mine also loves Charlotte Russe http://www.charlotterusse.com/home/index.jsp They have cute things but I don't go there much because it's all girls clothes. Also check out Zappos for cute things at great prices http://www.zappos.com/

Last suggestion would be H&M
http://www.hm.com/us/
For shoes, you can't beat DSW http://www.dsw.com/

Good luck and happy shopping!!!!

depends...1. are you willing to wait a while for your items? 2. are you willing to use a shopping service?
The first 2 pics are from a japanese store called dreamv which focuses on gyaru items and princess gyaru items, they're more cuter and quirkier
http://www.rakuten.ne.jp/gold/dreamv/
The last two are from galstar , which is more mature but still cute items
http://www.rakuten.ne.jp/gold/galstar/

If you need help on how to order from any of those two places please feel free to contact me :D Some reviews of the stuff :
Dreamv
http://www.youtube.com/watch?v=Dy_8UyOgvtY&
Galstar
http://www.youtube.com/watch?v=hIb6gR3ztjU&

If all else fails I'd reccomend bodyline and yesasia...
THEN you could look for items on etsy and whatnot but i don't think they're as cute lol

Forever 21, dEALIA*s, I like department stores like Macys and even Khols

Wet Seal (: http://www.wetseal.com/home.jsp love that store!
also styles for less is reallly cute too!! (: http://www.stylesforless.com/

McDonalds and Walmart. You are lucky. Now these days McDonalds and Walmart share the same building.Smcfashion offers Wholesale dresses in large quantities