My brother gave me one of his button-up mens' shirts that was too big for him(size XXL). I thought the gorgeous burgundy suede fabric would make an awesome vest, so I decided to experiment. I re-used the buttons from the original shirt. It has a halter-top tie on the back of the neck, and a beautiful lace-up corset back. I TOTALLY LOVE how it turned out, sorta had a steampunk feel to it.
I made it from the sewing pattern M6149, vest A, with quite a few modifications.
I may be making another, tell me if you'd be interested in a how-to!