My new theory:

There is a direct relationship between how large a persons sunglasses are and their apparent lack of an I.Q.

1) 2)

3) 4)
Ashely Olsen is not pictured here do to the fact that she shares a brain with her twin sister Mary-Kate (Pic #3).

The collective I.Q. of everyone represented here would not understand a Baby Einstein video.

1) Paris Hilton 2) Nicole Richie 3) Mary-Kate Olsen 4) Victoria Beckham.