Jessica Simpson Reveals Jaw-Dropping Weight Loss

PHOTO: Jessica Simpson is pictured in a Weight Watchers promo. PlayWeight Watchers
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Jessica Simpson has been steadily losing weight after giving birth to her second child last summer, and now she looks and feels better than ever.

"I can honestly say I've never been happier," Simpson, 33, said in a new Weight Watchers commercial. "I have a newfound determination that I'm really proud of."

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Simpson, who gave birth to two children in two years, told "Good Morning America" last month that she "couldn't believe" the numbers on the scale. Group meetings at Weight Watchers have been helpful for her in her slim-down journey.

"When I started Weight Watchers, I wasn't sure what to expect at the meetings, but I really love going. It reminds me we don't have to do this alone," she explained in the video. "It's so much better to have backup and to do it together because we all face similar challenges. The meetings keep me focused and motivated."

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One reason the motivation is important, Simpson explained in February, is because she's planning a wedding to her longtime fiancé, former NFL tight end Eric Johnson.

"I have a date," she said. "It'll be soon enough."