(Cover) - EN Showbiz - Fergie has an annual five pound fluctuation.

The Black Eyed Peas frontwoman is famed for her gorgeously toned figure and womanly curves, but the star has admitted its difficult for her to maintain a regular fitness routine when shes on tour.

The stunning star is currently playing shows around the world with her band and the irregular hours, combined with sporadic eating, have caused her weight to alter.

"I kind of go on a five pound fluctuation every year," Fergie admitted to E! Online. "It's just either up or down a couple pounds. It's just usually how I live. I don't know if that's good for you but that's the way it is."

While on the road, the rest of the Black Eyed Peas work with Fergies trainer, DB Donamatrix. Will.i.am agrees that having a fitness guru around really motivates him to keep in shape.

"It's a different type of trainer when a dude inspires you to watch what you eat and change your whole, like, way of life," he revealed. "I just eat fruit, soups and fish, and I've been doing that stuff for six months. [I] lost 30 pounds. I haven't been this weight since I was in the twelfth grade."

The successful American group gave an intimate performance in New York City on Monday at an MTV World Stage concert.Will.i.am says the show reminded him of the bands beginnings before they were drawing in massive crowds.

"You know, we started out playing venues smaller than this," he said. "One time we did this one gig and it was so many people that weren't there that we were able to take our food from our rider and pass out chips to people." (C) Cover Media