"I've always felt cute, but now I feel sexier," the singer says in the new issue of PEOPLE this week.
She credits her new figure to taking Zumba classes, scaling down her portion sizes and sticking to her new healthy lifestyle. Says the singer: "I was determined."
Finding a healthy lifestyle has been a challenge for Sparks. In the past she tried to go vegetarian, "but I smelled a steak and was, like, 'I can't do this!' " she says. She even tried quick fixes like the Master Cleanse. "I lasted a day," she admits.
But don't worry. Sparks assures her fans she's not going to take her weight loss too far. "I definitely didn't want to lose my curves," she says. "I'm in a good place now."
For more on Jordin's incredible transformation and her exact meal plan, pick up this week's Most Amazing Bodies issue of PEOPLE magazine