She's inspired legions of overweight Americans to shed unwanted pounds thanks to her work on NBC's The Biggest Loser, but tough-as-nails trainer Jillian Michaels has waged her own battle of the bulge since becoming a mom.

Bringing adopted daughter Lukensia, 2, home from Haiti less than a week after her partner Heidi Rhoades gave birth to their son Phoenix in May, Michaels tells the October issue of Redbook magazine that she found herself carrying around a few extra pounds after her family expanded.

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"I went to interview Suze Orman for The Insider, and her wife said, 'You're chubby! And Suze said, 'You look like a mommy now,'" Michaels -- who just inked a deal to return as a trainer on The Biggest Loser for this winter's season 14 -- recalls of her friends. "I look at my body and I go: 'five pounds heavier.' But part of me really likes it."

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As she and Rhoades raise their son and daughter, Michaels tells Redbook she looks to voluptuous celebrities like Beyonce rather than stick-thin models to inspire a healthy body image in her kids. "We talk about role models for her, like Beyonce, who has a more curvaceous figure," says the trainer, who also appreciates the bootylicious singer's hot bod. "My taste has changed. I prefer that look. For now, I want to look a little softer."

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Deciding to return to The Biggest Loser after a two-season hiatus, Michaels will work with the show's first-ever kid participants, ages 13-17, in a bid to raise awareness of the growing childhood obesity epidemic. "Having recently become a mother of two, I am more passionate than ever about helping empower children and families with the information and resources they need to live a healthier life," she has said.

This article originally appeared on Jillian Michaels: I Got "Chubby" After Becoming a Mom