1. I'm a curvy girl. I have what they classify as "hour glass" figure. I'm a size 8/10 with a little waist and a pretty fab rack. But, the price I pay for such a fine rack is occasional back fat. That's why, when given the choice, I don't usually go for a strapless dress. I would rather avoid the whole fatty back thing, and the whole pulling it up all night thing, and just choose something with a halter or some spaghetti straps, and move on. And if you feel like I do, then my advice? Just avoid the whole "I need a strapless dress for my wedding or I'm gonna die..." thing... Don't do it. Bat fat problem? GONE!! See how easy that was? Problem solved. Pick something else.
2. If you're completely hell bent on walking down the aisle in a strapless gown, then lose some weight. There, I said it. Sorry, but it's true.