After a quick googling, I just realized I had been confusing
Beth Littleford and
Nancy Carell.
Or I should say, I thought there was only Beth Littleford and she was married to Steve Carrell and not that there was another blonde actress/comedienne who also worked on The Daily Show who is married to him instead.
But, then again, looking at them side by side, I think it's pretty clear why I mix them up.
I am apparently far from the only one with this confusion since on googling both of them I found images of the other and even a few similar blog entries. Oops. Now I just feel bad for them, they probably get that a lot.