Too many weddings this summer, and too many choices to make...

Recently I came across this glorious Halston Heritage tunic. There's no local NM for me to check the fit, but by the numbers I should be able to wear the XL. I'm considering ordering it to see..... the trouble is that it's not bra-friendly, and bras are a must for me.

Could it perhaps be layered over a tight-fitting top? I'm wondering if I can go column-of-black underneath, or column-of-ink?