Although Fergie's red-carpet style (which often lands her as a subject for Us Weekly's Fashion Police) may make her appear like the bionic woman, the Black Eyed Peas frontwoman isn't afraid to talk about her body insecurities.

"I think people think that I'm pregnant sometimes because my weight fluctuates," the 36-year-old told Allure, gracing its July cover. "I gain and lose weight everywhere from the thighs up."

"My problem is my discipline," the "Glamorous" singer continued. "I see a Jack in the Box or a DelTaco, and I will impulsively want it. I'm a work in progress in that area."

But despite having weight struggles, the star admits that there is one body part she wouldn't change: "I've learned to love my nose because it's unique. It's interesting, and it just makes me a little different."

Fergie [real name: Stacy Ferguson] told Access Hollywood back in April that she's putting her solo career on hold so she can spend time with her hubby, Josh Duhamel, 38, whom she married in January 2009.

"I've got a lot on my plate," she said, "and this year is more about simplifying and really paying attention to the projects that I have on my plate and spending some time with the hubby, you know?"