The shirt and shoes are courtesy of the boyfriend, the rest is mine. (That big suitcase holds my fabric stash and is too heavy to actually carry!)
I took in the sides a bit (not too much, it should be a bit slouchy), cut off the sleeves and cut the back into a racerback pattern. Then I lined it with some black bias with a lacey edge. I knew bias tape is sturdy and not perfect for hemming curved edges, but I was stubborn and used it anyway. You can see below how it won't lay nice and flat, but it doesn't really bother me in this case. I made three small pleats at the armhole instead of the usual bust dart, to get a nice curve.