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After 50 years, a controversial calendar surprised the world in a wonderful way.

"I felt I looked more beautiful than I've ever felt in my life," Amy Schumer says about the Pirelli calendar.

Progress is usually measured in calendar years, not calendars themselves. But this may be an exception.

For more than 50 years, Italian tire manufacturer Pirelli has released an annual calendar. Typically filled with pictures of models posing provocatively in various states of undress, the almost always NSFW calendar was the very epitome of the adage "sex sells."

For the 2016 calendar, they decided to try something a little different.

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