Cameron Diaz reportedly is set to try her hand at writing! She’s looking great as she prepares to celebrate her 40th birthday, so it makes sense that people would want to know Cameron’s secret to aging so well. Cameron said:

“My a** is definitely higher than it was when I was 20. This is the thing that people don’t understand — take care of your body (and it will) get better! It gets better as I get older.”

Cameron’s going to share her secrets in a health, wellness, and fitness book. It’s scheduled to hit stores in 2013. I know I’ll be checking it out! Whatever she’s doing is obviously working. How about you?

Photos by Teach/FameFlynet