I saw this on another blog, and decided to try it. For the record, the blogger's image showed faces that were all female, so I expected to be asked my sex before it checked for images. It didn't... not until after it showed me the faces. I decided to just leave 'em all in.
Besides Warren G. Harding and Mel Brooks, I don't know who the rest of these people are. I've heard the name Kelly Clarkson associated with music.
Anyway, the funniest part is that the person the program decided I look most like is Mel Brooks.