Mystery Flowers

I'm not sure where these flowers came from but I have a whole cluster popping up in an old garden bed.  Maybe a birdie helped "deposit" the seeds last year?  

BTW - The camera sensor didn't do well with this vibrant pink and although close to the original color, it is a little bolder than in real life.  I'm too tired to muck with it and too lazy to Google this to see what kind of flower it might be...