Seriously, how classically Gemini/Mercurial is this pic? That little half smile and expression like she is harboring some outrageous gossip or a very funny joke is Gem to the max.
Of course, for the ultimate in enigmatic smirks, we cannot go past the Mona Lisa, right? Another Gemini. See The Mona Lisa Is A Gemini.
If you are a Gemini, do tell – do you cultivate this sort of an expression or is it au naturel?