Now that filming has wrapped, the singer will be watching her diet throughout the holidays, reports UsMagazine.com.
Fergie explained, "I’ve actually gained 10 pounds! No, really – for the film, Nine. Actually, 13 to be exact. I ate everything! Fish and chips. Everything fried – things I don’t normally eat."
Although she enjoyed indulging herself, the Black Eyed Peas singer is anxious to lose the weight, saying, "I have to give it up!