I have this cute black bodice, but the sides were too exposed for my taste. So I salvaged some old lace and turned it into this sweet little number.
I like how the zipper, the black, the lacing, and the grommets are all rounded out with this sweet lace I bought at Joann's. This is what the bodice looked like before without the lace.
Now, pin the fuck out of the other side of your top. Sew it down likewise.
Conversely, if you just took a tank top and sewed up the sides with lace, it will look something like this.