Fergie: I've "Gained 13 Pounds" for Nine

"I've actually gained 10 pounds!" she told reporters Monday. "No, really - for the film, Nine. Actually, 13 to be exact.

"I ate everything!" she continued. "Fish and chips. Everything fried - things I don't normally eat."

See photos of more stars who have packed on pounds for a movie.

But now, she said, "I have to give it up! So, yeah – I'm in that phase!
Back to diet designs – my food delivery service!"

See who looked the best this year.

Will it be tough with Thanksgiving just weeks away?

Nah.

"You can do creative things!" said the singer, who is engaged to Josh Duhamel. "You know, turkey isn't fattening – you can do that. A little bit of gravy – have a nice big salad!"

She told Usmagazine.com she still plans to indulge.

"I like a good pumpkin pie – that's my favorite – with homemade whipped cream," she told Us. "Whipped cream from scratch. I'll eat it for breakfast, always."

Her post-holiday workout plans?

See how Fergie and other stars got their bikini bods.

"I don't know," she said. "I'll let you know when I do!"

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