Sometimes Forever 21 gets a bad rap.
They market to a younger crowd, their jeans sometimes fit 3 year olds,
seams and threads come undone, and
everyone. shops. there.
To some of these, I agree.
BUT, what I do like about Forever 21 is that you can absolutely create your own sense of style. You can mix, you can match, you can be daring with prints, or sleek and classic with solids. They really do have a knack for a trendy eye and encourage
dressing to make a statement. 
I have rounded up some pieces that I think would make
you feel more comfortable about shopping at your niece's 
after school job.
(click link above for all treats)