Riding high on the back of mega-hit single "Umbrella", West Indian pop diva Rihanna has divulged her diet secrets.

Saying that all she wants is to be toned and healthy, the svelte singer claims to never have deliberately set out to lose weight.

"I'm working out and trying to eat healthy," she says of her slimming routine. "That's making me lose weight without even thinking about it. I'm not intentionally trying to get skinny."

Rihanna has said that her fitness regimen revolved around a great deal of cardio and weight training two or three times a week. "I work with a trainer," she explained. "We work on the arms. I don't want manly, muscular arms. We work out my butt because I love my butt. [But] my legs are my main focus. I'm obsessed."

In order to maintain her trim, taut, and terrific figure she's watching everything she eats (as opposed to putting it in her mouth with her eyes closed, no doubt), and consuming carrots, loving lettuce, cucumbers and egg whites, and making her snacks fruit-based ones, and drinking plenty of water.

But she's staying well away from pasta and the like: "I like carbs," she said, "but at the end of the day, carbs are the enemy."

Are carbohydrates really the enemy, or just your tasty friend?