Is that a blouse or a dress???

I bought this skirt on a whim, but when I got home I wasn't sure what to wear on top....I almost went out and bought a navy blue blouse, cause I'ma sorta a sucka for the blue/green combo. But I'm soooo glad I remembered I had this hanging in my closet AND it fits perfectly under this skirt!

Surprise!!! It's a dress and a blouse! :)