Christina Aguilera has attributed her curvy post-pregnancy body almost entirely to breast-feeding.

Since giving birth to son Max in January, the singer has lost a lot of her general baby weight but is keen to show off her enlarged boobs - because they're responsible for the weight loss elsewhere.

She explained recently: "Breast-feeding is my secret workout.

"It can take a lot out of you, so the pounds tend to fall off."
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