Sometimes it`s hard to recognize celebrities in their natural state. They must have special effects make up on or something when they are on TV or the movies.
Off the top of my head, I remember getting a hair cut next to one of the girls from Girls Next Door, but I didn`t recognize her for about 15-30 minutes. I saw another one of the girls (on a separate day) but only recognized her because of her loud distinctive laugh (after 15 minutes or so).
My wife and I saw Halle Berry (she goes to the same brow salon as my wife) but I didn`t recognize her even after my wife was telling me to LOOK! LOOK!...I was like WHERE! WHERE!
(I never thought she looked THAT good with make up, but without it she looks horrific).
For the Japanese fans, I saw Yoshiki with his GF recently too.