Well, if it were mine and I wanted to fancy it up (which I wouldn't because it looks completely functional to me and I would be fine with that)... but if I WAS going to pretty it up, I would paint it some kind of neutral color, like off-white to tan. Then paint/stencil some vines and ivy "growing" up the sides. Then, use a corner bracket like this on the top two corners:
OR, if you wanted it to look more barn-ish, you could give it a fresh coat of red paint, make a "Z" design out of wood, paint it white, and put it on the door and use some black metal brackets and hardware like this to dress it up:
ORRRR.....
You could buy a six foot long length of two foot tall decorative fence and nail that up to the front on the outside. Like the fence in front of this house: Paint it a complimentary color to whatever color you choose for the coop. (maybe green coop with yellow fence, and you could hang a planter of flowers from the fence.)
BUT neither of those options sounds really blingy to me. Bling = flashy in my book. If you want flashy, paint it purple. Use gold or silver (or chrome) hardware (handles and hingest, etc.) Get you some glue-on rhinestone baubles and hang a disco ball in it.
I really can't help you with the roof.
Cassandra
Sorry for the big pictures. I stole 'em from the interwebz.