What?: Refinery 29
Why?: I'm pretty much obsessed with this website. They have all the fashion and shopping news you could ever want, and I love all their slideshows. I have a thing for slideshows. They also bring my attention to things like this. Not to mention their Reserve has tons of amazing deals on extremely covetable goodies.
They have specific pages dedicated to New York, San Francisco, DC, Los Angeles, Chicago and Miami (please come to Boston, Refinery 29!) and their Everywhere page that covers, well, everything. Something for everyone here!