I don't think she lost the weight too fast. She's 5'2", small jumps in weight are super obvious on such a small frame. It took her a little over 6 months to slim down like that, didn't it? Doesn't seem so unreasonable for that frame. Consider how quickly she lost the baby weight after her son was born, too.
Half of her outfits made the weight gain appear far worse than what it was. It's almost as if she wanted to exaggerate the gain at times.
Christina isn't my favorite musical artist but just because she was heavier doesn't mean she stopped being Christina Aguilera.
Obviously he didn't mean it in a literal sense. But Christina was never the type of artist to have such heavy weight fluctuations. The fact that the weight was gained after going through a really rough period of her personal life and career indicates that there was a point that she stopped caring and taking care of herself. She wasn't "herself".
why was he naked
I'm sure she really values his gross opinion.