After piling on the pounds for a film role, Fergie is now desperate to lose some weight in time for her wedding.

The singer is trying to get back in shape for her big day on January 10th when she ties the knot with Josh Duhamel.

The Fergalicious star opted for an all-you-can-eat diet to supersize her lady lumps for her part in new musical Nine, which hits the big screen this year.

She told People magazine, “It’s hard. I’ve been working out every day.”

Fergie said her routine involved “a lot of hiking and doing a bunch of sit-ups, working my butt off and just, you know, trying to maintain and stay healthy.”

And it looks like she is on the right track, Fergie looked toned and slim as she celebrated NYE at the Venetian in Las Vegas