Hey ladies, so my dress has a keyhole in the back and is a little low cut in the front. So I need a GOOD STRONG (I'm carrying around some D's) strapless, backless bra. Does anyone have any suggestions? I've never worn one of these and they are expensive so I want to make sure I get a good one. P.S. my dress is outside in a garden at the end of June so it's gonna be hot! Any suggestions would be greatly appreciated. Thanks!