Fergie is feverishly trying to tone up before her January 10th wedding to Josh Duhamel. Fergie, who is known for her famously sculpted body, had to put on weight for her role in Nine but doesn’t want to look out of shape her in wedding dress.

more juice after the jump…

Fergie told People.com she’s been “working out everyday.” Her workout routine? “A lot of hiking and doing a bunch of sit-ups, working my butt off and just, you know, try to maintain and stay healthy.”