Cameron Diaz Instagrammed this photo of herself yesterday. She’s wearing (relatively) little makeup. She’s holding a copy of her book The Body Book. It goes on sale on New Year’s Eve. Here’s the description from the publisher:

Cameron Diaz shares her formula for becoming happier, healthier, and stronger in this positive, essential guide that is grounded in science and inspired by personal experience.

Throughout her career, Cameron Diaz has been a role model for millions of women. By her own candid admission, though, this fit, glamorous, but down-to-earth star was not always health-conscious. Learning about the inseparable link between nutrition and the body was just one of the life-changing lessons that has fed Cameron’s hunger to educate herself about the best ways to feed, move, and care for her body. In The Body Book, she shares what she has learned and continues to discover about nutrition, exercise, and the mind/body connection.

Grounded in science and informed by real life, The Body Book offers a comprehensive overview of the human body and mind, from the cellular level up. From demystifying and debunking the hype around food groups to explaining the value of vitamins and minerals, readers will discover why it’s so important to embrace the instinct of hunger and to satisfy it with whole, nutrient-dense foods. Cameron also explains the essential role of movement, the importance of muscle and bone strength and why we need to sweat a little every day.

The Body Book does not set goals to reach in seven days or thirty days or a year. It offers a holistic, long-term approach to making consistent choices and reaching the ultimate goal: a long, strong, happy, healthy life.

I had a reaction to the phrase “grounded in science and informed by real life”. We all have the opportunity to learn about the “science” behind maintaining a healthy body. Do we all have the resources and the time to pursue what we’ve learned and apply it to our lives?

Whatever. This is not the discussion you want to be having. What you really want to talk about is why Cameron’s going off on her own body philosophy when her best friend Gwyneth Paltrow already did and why isn’t she following it?

Paltrow’s body program is a partnership with Tracy Anderson. And, well, Tracy Anderson is all about the baby food. I told you about this, right? When you go to the Tracy spa to fix your body, baby food is what you get for dinner. I’m assuming this isn’t what Cameron Diaz is promoting.

It’s fascinating to me how celebrities “write” their books. As you can see from the cover below, Cam’s The Body Book: The Law of Hunger, the Science of Strength, and Other Ways to Love Your Amazing Body was written “with” Sandra Bark.

What does that look like? Who actually does most of the writing? And the editing? Is it totally equal? Do you believe that they sat side by side, the two of them, Cameron and Sandra, and worked on every word together? Having just written a book myself, I wonder what it would be like to have someone who was the “with” to my writing. Would the process have been easier? Because goddamn it was so f-cking hard.