The blouse is Commes des Garcons. Seems that the navy dress in the collection is also very similar to a Marc by Marc one from 2008.
There's an article on Fashionista: http://fashionista.com/2012/01/adve...-inspired-by-marc-by-marc-commes-des-garcons/
You'd think Taylor would know better. I mean, people were definitely gonna notice. I love the collection though. And look, Sarah wearing her pants!
harpers bazaar