The Black Eyed Peas singer told MTV News that she prefers to concentrate on other projects, including the band's forthcoming album The Beginning and a collaboration with Slash.
"We have The Beginning, which is coming out now, so I'm all about Black Eyed Peas right now," she explained.
"And Slash, my inner rock chick coming out in that world. I've got my footwear that I'm concentrating on; that's a big [project]."
Asked what fans can expect from The Beginning, Fergie said: "You should expect deeper, a little bit darker electro beats and a little bit more of relationship issues on this one. A lot of funny stuff as well."