Bike Chic: Heels?

Ok, this looks glorious.  I could never ride like this mind you.  But a) her bike is gorgeous, b) so is her outfit!  Her hair is pretty freaking awesome too.  But here's my question, do you, or can you bike in heels?  I don't seem to be that coordinated.  However, when someone pulls it off, they look fierce, yeh, I said fierce.