Twenty four year old Scarlett Johansson is on a diet. She's counting here calories and it seems being very rigid about it. The actress is 5'3" tall and acknowledges she'll never be very tall or very thin. But it seems she is looking slim these days.
Scarlett has said in the past that she is not much of an exerciser. She'll take a walk, do Yoga once in awhile. In the past she has also acknowledge eating some junk food but apparently not these days.
She has criticized the media and Hollywood for promoting an image that causes unhealthy diets and eating disorders.
Johansson appeared nude on the cover of the March 2006 issue of Vanity Fair. In 2007, Maxim named Johansson #3 in their Hot 100 issue.
In November 2006, she named "Sexiest Woman Alive" by Esquire and in February 2007, she was named the "Sexiest Celebrity" of the year by Playboy.
Pictures are from wikipedia