"Only if it turns out that reality is actually nothing more than a holographic illusion created by the interplay of subatomic particles on a vast two-dimensional membrane."
This article covers a subject that has been deemed non-canon by either the author or the Back to the Future licensees, and thus should not be taken as a part of the "real" Back to the Future universe.
She was shown hosting the various stages of the expo. When the car contest began, she announced the winner, along with Goldie Wilson III, who provided the grand prize.