The returning Voice US judge, wowed in a pink mini dress with a frilled hemline as she smiled for photographers on the red carpet at NBC summer tour held at The Beverly Hilton Hotel.
Christina looked radiant and beamed from ear to ear as she showed off her mini waist, toned legs and cleavage. The 32-year-old teamed her cute dress with nude peep toe heels while showing off her tan and tousled bleached hair.
The 'Genie In A Bottle' singer - who is believed to have achieved an estimated 20-pound weight loss according to reports - has been losing weight steadily over the past few months.
A source told US Weekly that Christina's new fitness regime is down to a combination of healthy eating and exercise.
Christina, who is mum to five-year-old son Max with ex-husband Jordan Bratman, debuted her new figure on the The Voice's season finale last month (18 June) when she performed alongside Pitbull for their pop hit 'Feel This Moment.'
Christina is now set to return to the American talent show this year after taking a season off. Speaking to Access Hollywood about her time away from the screen, she said: "I'm the type of person that I cannot live in front of the camera 24 hours a day.
"I have to take breaks and stay connected with myself. I check out and I'm mum and I needed some time, I needed some time to do that," she added.