Armie Hammer
"My college roommates' cousin(I believe) went on a date (maybe multiple dates) with Armie Hammer before he blew up in "The Social Network" and apparently he forgot all about the date(s) they went on and when he tried to re-introduce himself to her at another encounter, she said something along the lines of "I know....we used to date." Pretty sure the guy is married now."
Because, as we all know, famous people didn't have a life when they were unknown and never knew, dated, or even spoke to people then...
#9 I hope she enjoyed his pickle.