I think anyone can look angry/happy/crazy at the right time the picture goes off. Everyone even has those in their digicams.
Or maybe she was frowning, maybe the girls a b**ch.. who knows.
I never even blamed Bush for his funny pictures because I get boggers, look stupid, make funny faces, squint, etc. all the time... and I'm not getting my picture taken every five seconds to document it.
So far Michelle seems pretty cool to me. Good mom to her kids, which, if dad is president is important.