I have a Polyvore acct and I do use it although it is kind of tricky. Imagine my delight when, reading Angie's post day, I clicked on blue blouse in the style blog. It led me directly to Polyvore and I was treated with the opportunity to "follow" YouLookFab outfits in all their goodness. This may be old hat to some of you but it is awesome. Even if you don't want to use Polyvore for yourself you should DEFINITELY check out the YouLookFab outfits there! So cool! Here's the link if you need it!
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