VIDEO : Who Did Christina Applegate Ditch Brad Pitt For?

Andy Cohen dug deep into Christina Applegate's past Sunday.
The host of Bravo's Watch What Happens Live asked the star of Warner Bros. Vacation to play "Plead the Fifth," but to his chagrin, she wasn't as forthcoming as he had hoped. One Cohen question struck a nerve:
"I have read your research extensively. There's much talk of a date that you were on with Brad Pitt to the MTV Movie Awards in 1989 in which you reported that you ditched, mid-date...You said you ditched him for another guy. My question for you, Christina, is who was the guy that you ditched Brad Pitt for?" Applegate, who is friends with Pitt's ex-wife, Jennifer Aniston, was tight-lipped and refused to answer.