Britney Spears Weight Loss?

Just out of curiosity have any of you read into Britney Spears weight loss? I don't know if it's just me, but it doesn't seem that healthy. She is working out in the morning for 1 hour then weights at night for another hour and 1,000 crunches a day! On top of that she is dancing and is eating a diet of only 1,200 calories lean protein.