Former American Idol contestant Kimberly Caldwell is singing a new tune now that she's shed 20 pounds from her petite frame. "I've always been confident and secure," a newly single Kim, who recently split with last season's Idol winner, David Cooke, tells Life & Style. "Now it's a different kind of secure."

How did Kimberly shed 20 pounds? Pick up the latest issue of Life & Style, on newsstands now!

Photo Credit: Lisa Rose