Stupidity hurts. Spending $100k on a wedding is stupid. Risky, too, as Ms Buttitta found.
A couple's finances and obligations aren't merged until they're married. Obviously during the engagement and wedding planning phase they aren't married. So if either one of them entered into agreements with vendors for a big wedding party, then he/she did it as a single individual, not jointly as a married couple.
Now that I think about it, I recall from my own wedding planning days that several vendors took pains to remind us of this fact. Some even mentioned this in their contract, that even if the wedding was called off, whoever signed the contract would still be liable for the bill.
She should have known that a wedding isn't a sure thing, that either of them would be free to call it off before the big day. She also should have known that taking out the financial obligations all in her name was a dumb idea. She could have protected herself by splitting the obligations up evenly between her and her fiance, but she didn't think to do that. Oops.
As I said, stupidity hurts.