When we first spotted shots of Mrs. O from last night's Presidential soiree, we were sure that the First Bob was no more. Not so. "It’s an updo. Not haircut," the First Lady's press secretary, Semonti Mustaphi, told us. But M.O.'s clever mini-bun got us thinkingcould the style be a test run for a big chop? With her strong features and spotlight-stealing presence, the First Lady could doubtless pull off a pixie. Do you think she's ready for a change?