Carnie Wilson discusses her public weight loss struggle.

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Singer Carnie Wilson's war with her weight has been a lifelong battle. As one of the members of Wilson Philips and the daughter of the Beach Boys' Brian Wilson, she had always been known as the fat one in the family. As a 5'3" adult, Carnie ballooned to more than 300 pounds.

In 1999, Carnie underwent a very public gastric bypass surgery and showed off her smaller self—down to 146 pounds—on The Oprah Winfrey Show. But Carnie says she slipped back into bad habits in 2008, and her weight jumped back up to 220 pounds.

Now, Carnie is expecting her second child and has gotten her weight—and life—under control. "I am at a very grateful place. I weigh 168 today," she says. "I'm in a beautiful, way more balanced place."