The New York Post is all a-flutter today over how Brooke Astor's daughter-in-law, Charlene Marshall, "burst into laughter" when a Post photographer introduced himself to her yesterday, because of their funny "Bad Heir Day" cover. "We're A Hit With Mrs.," is the story's headline. We're surprised they went that far to promote themselves, since Mrs. Marshall is carrying yesterday's New York Sun in the accompanying photograph. (And on top of that she is carrying what looks like her husband's indictment, which strikes us as a bit callous, considering how hard she's hee-hawing away, but who's really keeping track?)