Janet Jackson’s got a new diet book coming out this fall.

It should contain tips about how she dropped 60 lbs. — and is looking great, by the way — since a few years back when her weight had gone up dramatically.

We all know Janet has had her ups and downs with weight gain and weight loss.

And I hope Janet Jackson’s new book is honest about how she really took it off. I know some stars do drastic things to take off the weight, then tell the public that it was just fruits and vegetables and exercise.

I’m glad Beyonce and Sherri Shepherd were honest using the Master Cleanser Diet Fast to lose their weight…