This is really really funny. Hat tip to Balloon-juice:
http://www.balloon-juice.com/...
I don't think this was photoshopped either, since the kid with the 'O' is just a tad taller than the kid with the 'M', and they were supposed to be arranged in order from tall to short. Since Mittens couldn't see the front of the shirts from where he was, he didn't identify which kid was taller.
Really, nothing else to say. This could be the photo that completely sums up Mitten's campaign.
5:59 AM PT: OK, yes, a commenter said that this was photoshopped. Oh well. It is still funny.