Last week, we gave you our short list of candidates vying for the cover of the 2012 Sports Illustrated Swimsuit Issue. Everyone has their favorites – ours is Kate Upton – but how WELL do you know your top model? Would you be able to pick her out of a lineup if you couldn’t see her face? We put your skills to the test with these sneak preview pics from behind the scenes of this year’s SI Swimsuit Issue shoot. Take a look and send us your best guesses.