D.W.
Ikea!
www.ikea/com/us
My daughter will need a new quilt or comforter set soon. Need ideas where to look whether on-line or in store.
Ikea!
www.ikea/com/us
My favorite is Pottery Barn Kids but have also seen some cute stuff at restoration hardware baby & child, Target, Marshalls.
ebay... you can get some cute and name brand things on there for a lot less. pottery barn kids is always cute, but expensive.
I like Target if I'm getting a set. I like IKEA for their individual sheet selection!
wal-mart. Inexpensive is the name of the game in my book. and they have some cute stuff too.
Personally I like Garnet Hill - it's a little pricey but their sheets are awesome, high quality and comfortable, and their ones for specifically for kids have some really cute designs. You didn't mention her age but your daughter might also find something "non-kid" that she will really like (they are on-line and have a catalog).
There's always Bed Bath and Beyond too.
company kids has some really cute stuff, very matchy-matchy too, expensive though imo...