Some say Friday the 13th is bad luck. Not for this week's COOL Photo of the Week winner.

Shelby submitted a very COOL photo of a reflection of sunflowers on the back of a car mirror. We all know how abundant sunflowers are in North Dakota and Shelby gave us a very unique way of showing them off.

Shelby Rooker

And with that, Shelby earns herself a platter of Subway subs which she can share with up to 11 of her friends.

This week was a great week for COOL photos though. There was a lot of really awesome photos so this wasn't an easy choice.

You can check out all of this week's photo submissions in the photo gallery at the top of this post.