Jennifer Hudson will have to find a new diet to keep off the pounds. The Oscar-winning actress has ended her relationship with Weight Watchers that contributed to her remarkable 80-pound weight loss.

Despite going from a size 16 to a size 6 on the famous weight-loss plan, Hudson has reportedly ended the four-year endorsement deal. And it appears the Dreamgirls actress doesn’t think it ended on good terms.

Her rep said in a statement that Hudson parted ways amicably with Weight Watchers after fulfilling her contractual commitments. But Hudson’s comments on Twitter, which were quickly deleted, didn’t appear too friendly. "Sometimes you have to step back and let your work speak for you, and when that doesn't work you walk away knowing you did your best,” she tweeted. “It's been fun and a pleasure good luck to you all. @WeightWatchers."

Jennifer Hudson Jennifer Hudson looked electric on the AMA red carpet in an asymmetrical Christian Dior gown.

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Hudson then tried to downplay the controversy by crediting the company with her weight-loss success. "My experience with Weight Watchers has truly been life changing," she said in a statement yesterday. "I am grateful for what I have learned throughout the process and will always take it with me. I have chosen to step away from my role as ambassador and I am excited for the year to come, with many new projects and lots of new music."

Jennifer Hudson Cast member Jennifer Hudson proved to be a sheer beauty at the premiere of the movie Black Nativity at the Apollo Theater in New York.

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The singer starred last October in the film The Inevitable Defeat of Mister & Pete, in which she played a heroin addict. But in real life, Hudson has banned alcohol and drugs from her life completely. "I've never done anything, so that was hard to play this role. I've never had a drink in my life. I'm sober,” she said. "I've never been interested. Nobody ever believes it … When I got this role, I was like, ‘Oh my god, what am I gonna do? What am I gonna pull from to play the role?'"

Hudson learned about addiction and recovery by speaking with ex-addicts at a rehab center, where she heard shocking stories, including one about a woman who zipped up her baby in a backpack while trying to score drugs.  "They took me through each and every step of what it’s like of how you get addicted to drugs and what it feels like when you are high,” she explained. “She told me it was like an orgasm. I was like, ‘I could do that part!'"