In 1989, Christina Applegate and Brad Pitt went to the MTV Movie Awards together - but they didn't leave together. Applegate famously ditched Pitt midway through the event and left with another guy. Who lured her away?

Andy Cohen confronted Applegate about the evening on Watch What Happens Live Sunday, during a round of "Plead the Fifth." Unfortunately for curious viewers, the Vacation star did just that, and refused to answer the question, even though she had already pleaded the fifth on an earlier query.

But she did offer a few clues. The mystery man was well known, though he wasn't an actor. And he and Applegate never had a full-fledged relationship.

Watch the interview below. Who do you think Applegate's paramour was? Would Applepitt have lasted otherwise?