Pop star Fergie packed on the pounds for her new movie Nine by gorging herself on fish and chips.

The singer admits she has gained 13 pounds for her new role, and she loves her new voluptuous figure - but it'll all have to come off after Thanksgiving as she prepares for her 2009 wedding to movie hunk Josh Duhamel.

She says, "I ate everything. Fish and chips. Everything fried - things I don't normally eat.

"(Now) I have to give it up... Back to diet designs (and) my food delivery service."