You all must really like Jessica Biel: for the fourth year in a row, she's earned your votes as the fittest female celebrity. In not-so-close second place was Jennifer Aniston. Even though Jessica wasn't a huge presence on the acting scene this year, she kept true to her nature girl roots by staying very active outdoors during 2010. We all thought it was incredible that she trekked to the peak of Mt. Kilimanjaro, and kept up the rest of the year by snowboarding, biking, and walking for charity.