My daughter is 11 and she still likes Justice, but I can see that's going to stop soon because some of her friends are starting to shop Abercrombie and Aeropostale. So far she's too small to wear some of the Aero and Abercrombie stuff as she's still a size 10.
Her friends that are in 6th grade where it's part of a middle school want the Abercrombie. Her friends that are in 6th grade where it's still part of elementary school still wear Justice, so I think Justice is an elementary school thing.
We don't actually shop at any of those stores, we shop the secondhand store. They carry those brands gently used for a fraction of the price. She might get some new stuff if it's on clearance or for birthdays or Christmas.
Luckily my daughter is okay with getting a few things at Discovery, a very inexpensive store. They have things that say "LOVE" and look like the Love Pink from VS but are not really. It depends on your daughter if she's the type to go for "fashion fakes."
My daughter loves to create her own style, and at this point is okay with me finding her things at stores like JC Penney that look like the Justice stuff. I think for her it's about the look, not the name brand. We'll see if that's still true in a few years!