Answer:
Preteens and Small Teenagers - Justice. Cute clothes, kind of expensive sometimes.
Teenagers - Aeropostale (inexpensive), Hollister (expensive, but pretty good sales), American Eagle (certain types of clothes are expensive), and Abercrombie and Fitch (expensive if not on clearance). Keep in mind lots of preteens or small teenagers can buy size XS or small in these stores, and can get cute clothing at "abercrombie kids"
Some kids also like Forever 21, Delia's, and Hot Topic.