But we're shocked to hear that the voluptuous star, revered for her hourglass figure, is rumoured to be going on a diet and ditching her signature curves.
"Christina has got sick of all the talk of her being the curviest woman in Hollywood. For her it basically meant she was being called fat," a source told the Daily Mail.
"Now she's gone against everything she believed in before by going on the first diet of her life.
"Christina's cut out carbs, and alcohol, although she's not a big drinker. She's eating fish oil to break down fat and pak choi and edamame nearly every meal. She hopes the first stone will fall off in the next month or so," the source revealed.
Christina, who has inspired the return of the hourglass figure and sparked a rise in sales of push-up bras, has recently been seen covering up her curves. So perhaps we should have seen this coming.
We wonder what Equalities Minister, Lynne Featherstone, will make of the star's alleged plans to go on a diet. The politician, who believes that women should aspire to a size 14, cited the Mad Men actress as the "perfect role model".
How do you feel about Christina ditching her curves? Tell us your thoughts below.