Just a stab...is it Love-in-a Mist?

Here is a link that might be useful: Nigella damascena

It's presumably a wildflower of some type. Try looking for an image of it at this great website which shows the wildflowers of Minnesota -

http://www.jburroughs.org/science/resources/wildflowers/mnwildflowers.html

you could have a wild phlox

Here is a link that might be useful: Wildflowers of Minnesota

Found it! It's Centaurea Montana

http://www.robsplants.com/plants/CentaMonta.php

I planted bachelor buttons, but not this. Wonder if it could've gotten mixed up in the package?
Good thing it's beautiful!
Thanks a lot guys - and I'm going to have to plant that Love-in-a-Mist - I really like how it looks too!

The common name for Centaurea Montana is perennial bachelor button. It is a lovely flower but it can reseed and spread rather quickly, so keep your eyes open. I usually cut mine back after bloom.

Thanks - I'll try to remember that - I have so much to learn about flowers and decorative stuff.
Right now our beds are still new and I LOVE finding out that things reseed - I want an entire lawn full of flowers without all these bare spots (and without having to plant so many annuals).
Thanks for helping me out you all!

mickeyjane, I have a pink version and would like to plant a blue one next to it. If you collect seeds or divide your plant I have lots of choices to offer in trade!

Leaveswave-I have a bunch of C. montana over here that I put next to my woods 5 years ago and they just thrive away.
Some of the clumps have gotten quite large. They have never reseeded for me tho. Perhaps we can do a trade later on.