http://www.debshops.com/short-prom-dress-with-stone-trim-keyhole-back/1000051191.html?dwvar_1000051191_color=430&prefn1=colorName&prefn2=size&cgid=4401&dwvar_1000051191_size=9&prefv2=9&prefv1=Blue Im wearing it to a wedding and have no idea what type of bra to wear. I do not want to wear those sticky things, a real bra. Im wearing it to a wedding and have no idea what type of bra to wear. I do not want to wear those sticky things, a real bra.

For dresses with keyhole strapless bra used without bra or strapless bra backless there are some, which the back is transparent to the naked eye and is practically not visible

I'm not sure there are actual bras that could work with your dress, but its really cute! Here's an article I thought of when I saw your question, and it might be better than any answer you'll get here. It's from Seventeen magazine. 馃榿

This video will answer your question: