Continued from Janet Jackson: 2007 Weight Loss and Diet.

It’s not just discipline that keeps Janet Jackson is good shape. Her nutritionist describes Jackson’s diet plan:

“She’s maintaining very well!” Janet Jackson’s nutritionist, David Allen, says of the singer’s 1,300- to 1,650-calories-a-day diet plan. “We try to match her intake to the amount of work she’s going to have during the day.”

Adding extra noshes to the routine she typically follows — three meals and two snacks a day — helps Jackson stay fueled for rigorous rehearsals. Allen describes samples of her daily menu:

Breakfast 4 egg whites with 1 yolk and half a grapefruit. Or: 3 small oatmeal protein pancakes with sugar-free maple syrup and 2 slices of turkey bacon.

Midmorning A protein shake.

Lunch A mixed-green salad with grilled zucchini and 4 ounces of grilled chicken with olive oil and lemon pepper dressing. Or: 4 ounces of tuna salad mixed with Dijon mustard and wrapped in lettuce, and an apple.

Midafternoon 6 ounces cottage cheese and berries. Or: 12 almonds.

Dinner 5 ounces grilled tilapia with half a cup of wild rice. Or: 5 ounces ahi tuna with grilled asparagus. [source: Us Weekly]