The 'Runaway' singer has spoken openly about her life-long weight loss battle since signing on as a spokesperson for diet company Nutrisystem last week.
In an interview with USA Today, Janet recalled that brother Michael frequently teased her about the size of her bottom when they were growing up.
"He talked about my butt being too big," she said. "Some of us have a big butt, and some of us don't. I've learned to accept it and love it."
Janet also explained she doesn't approach her Nutrisystem weight loss plan like she would a traditional diet.
"I'm not viewing this as a diet. I'm not putting a number on it," she said. "I don't look at the scale. I'm going about it in a different way this time."
Janet is to star in a series of adverts for Nutrisystem and appear in print campaigns.
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Watch Janet Jackson's 'All For You' music video below: