updated 10/20/2009 AT 8:00 AM ET
•originally published 10/20/2009 AT 8:30 AM ET
Wearing a flattering pink gown by Donatella Versace, Hudson, 28, told PEOPLE at the Whitney Museum Gala in New York Monday night that her secret to slimness is simple but ongoing.
“I’m still working on it,” the Oscar winner said, adding that she walks 45 minutes to an hour every day. “I’m eating right, exercising, cutting sugar out of my diet. That’s pretty much it, and walking every day, making sure I do some kind of exercise.”