City Sweetness: Bakery Suggestions in New York City?

Hipster Cupcakes hanging out ironically at the Turkey's Nest Tavern in Williamsburg, Brooklyn
One of the coolest things about New York is that it's an ever-changing city. Every time I visit, I marvel at how many new businesses have emerged, how many have shut their doors, and how some old standbys are just holding steady.

So, as you know, I am heading to Brooklyn for the Renegade Craft Fair this weekend, which is  exciting not only because I'll be selling super-sweet artwork but because Treats Truck will be parked nearby for both days of the fair (booyea!).

But where else should I wander on the days before and after the fair? What is your favorite NYC bakery? Suggestions in any borough are welcome; I'm willing to travel for sweets.