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The Pirelli Calendar is one of the most exclusive calendars in publication, featuring well-known photographers and even more famous models, and we have behind-the-scenes footage from shoots for the upcoming issue.

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The calendar -- famous for its limited availability -- has featured legendary models like Kate Moss and Naomi Campbell as well as Oscar-winning actresses like Penelope Cruz and Hilary Swank. But it's not just those in front of the camera that draw attention to the trade calendar. It also enlists the highly trained eye of notable fashion luminaries such as photographer Mario Sorrenti and designer/photographer Karl Lagerfeld.

The calendar is only given as a corporate gift to a restricted number of important Pirelli customers and celebrity VIPs, so an appearance in the calendar has become a mark of distinction for everyone chosen to collaborate on the project.

When the 2013 calendar releases in Rio de Janeiro, ET's Chris Jacobs will be there to cover the event and chat up the stars.