Imo, she peaked during the 'Newlyweds' days,
like this...
Unfortunately, her wackjob of a former minister father runs her life, and it's been a train wreck ever since. As a supposed man of faith, her father should be ashamed to have two daughters both divorced and pregnant out of wedlock. Alas, he ignored any morality that he may have had and decided to pimp his daughters for every last dollar that he could make off of them.
The result, for us, was an uphappy Jessica, which meant fat, train wreck Jessica instead of smoking hot sex symbol.