Aw dress twins! I love it sooo much. I'm having the train cut off, I'm also having some of the crinoline cut out from under the dress to make it a little lighter. I remember the top being pretty sturdy, and I don't have a large chest, so not sure if I would need a bra..but I saw this https://www.amazon.com/gp/product/B01JVPFO2I/ref=ox_sc_sfl_title_3?ie=UTF8&psc=1&smid=A39ZLILE89DCZS on Amazon, it's completely backless, so was considering this if necessary.
I planned on the sticky bra for my low backless dress but then found this and im totally stoked. I just didn't trust that the sticky bra would be comfortable and importantly feel secure. I found this and when I put it on with my dress, it was the first and only time I realized I felt confident in my dress. The clear straps fit around your arms and hold you in pretty well.