(Photo : Reuters)

Adriana Lima creates history after being the first pregnant women to feature in the Pirelli Calendar

Adriana Lima is a veteran of the Pirelli Calendar, the annual calendar shoot featuring the world's top models in various states of undress. But the 2013 edition will be different for Lima. The Brazilian model is posing naked... while pregnant.

Vanity Fair Italia has published a series of behind-the-scenes photos from the 2013 Pirelli Calendar shoot set. Most of the faces snapped by photog Steve McCurry are familiar, including Isabeli Fontana, Petra Nemcova and Liya Kebede.

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Mother to two-year-old Valentina, Adriana Lima announced her pregnancy in March and has made few public appearances since. And unlike her model peers, Lima didn't take her top off for a nude pose during her last pregnancy.

Now, Lima becomes the first pregnant woman to be photographed for the Pirelli Calendar. And while there's been a whole bunch of posing-naked-while-pregnant phenomenon (after Britney, Christina and Jessica, we'd say the concept jumped the shark), seeing a supermodel bare her swollen belly could be the sexiest photo shoot in the world.