In the skit, Christina showed off her whittled waistline and slender legs by wearing a sexy waitress uniform. The slimline look made it clear that the superstar singer is proud of the weight that she worked hard to shed.
Christina devoted months to working with a personal trainer, during which time she followed a tailored diet, according to Us Weekly.
And those workouts were intense, a source told Yahoo! OMG. Her trainer designed them so that Christina could benefit from high-intensity interval training, which involves ""very high energy training for short periods of time."
What's a day like when it comes to her diet? Life & Style reported that Christina's low-carb diet resembles this:
- For breakfast, Christina combines healthy fats and protein, such as blueberries, half an avocado and turkey bacon.
- Snack: More protein, which she gets with almond butter on celery or a shrimp cocktail.
- Lunch: Low-carb chicken breast plays center stage, served with a vegetable salad.
- Dinner: Chicken or fish curry.
- Splurge: A glass or wine.
In addition, a source told Yahoo! OMG that Christina has eliminated almost all dairy foods.
"Carbs and large amounts of dairy are banned. On the agenda is a lot of coconut water, herbal teas, tofu, celery, oily fish and small amounts of low fat cheese," said the source.
But Christina has been doing more to enhance her body and mind than cardio and strength training. She told Extra TV that yoga helped her achieve her great body.
And for those who are skeptical of yoga's power to help you shed pounds, WebMD reports that an hour of yoga burns about 150 calories. But it does more than burn calories.
"Yoga is a phenomenal way to put you in touch with your body the way nothing else can, and yes, it can help you lose weight," says instructor Dana Edison, director of Radius Yoga in North Redding, Mass., and a certified personal trainer with the American College of Sports Medicine.
In addition, Christina says yoga helps her improve as a singer, according to Us Weekly. She even shared her yoga instructor's expertise on "The Voice."
""Today I brought in my yoga instructor, she's helped me so much as a vocalist," she revealed. As an example, Christina added that yoga can help you "get more centered in (your) body."