updated 04/18/2012 AT 12:45 PM ET
•originally published 04/19/2012 AT 7:15 PM ET
“I realize that 90 percent of losing weight is my diet,” Carey, 43, who promotes the Jenny Craig plan, says in the May issue of Shape magazine.
“Today my workout routine is more about getting and staying toned,” she says. “And for me, that means either taking hour-long walks a few times a week or jumping in the pool three or four days a week to do 45 minutes of aquatic exercises.”