Jordin Sparks' weight-loss tally: 50 pounds!

Former American Idol winner Jordin Sparks is about to have her moment on the big screen in the remake of Sparkle — and the girl looks incredible! The bubbly singer has dropped 50 pounds from her tall frame over the last couple of years. Naturally, we want to know: What's her secret?

"There is no secret," Sparks told US Weekly Tuesday night at the New York City premiere of Sparkle. "It's just better eating and working out! It's definitely a daily thing."

Her cardio is based around the popular Latin dance workout Zumba.

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"My mom's best friend is a Zumba instructor and I loved it," she added. "I started with walking then went to jogging and then Zumba."

She's also working with a pro one-on-one.

"I started [working with a trainer] and we did 30 minutes of circuit training," Sparks added. "So I didn't feel like I needed to be in the gym for two hours."

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Sparks was inspired to slim down after she won American Idol during season six.

"I knew I had a long road ahead of me. I was barely working out and my diet was a mess," she told Shape in the August issue. "I had to address when, what and how much I was eating."

Sensible thoughts from a sensible girl. You look incredible, Jordin! We can't wait to see how she does in Sparkle.

Image courtesy L.Gallo/WENN.com