Kirstie Alley

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Kirstie's dramatic weight loss has changed the way she views her body. She says that when she was 30 years old, she never would have worn a bikini in front of millions of people. "I was so introverted about my body," she says. "When I looked back on my movies and things [I thought], 'Wow, you had a really nice body.' But, at the time, I was [feeling] not good enough."

At age 56, Kirstie now feels comfortable in her own skin. "I don't think women ever feel like we're good enough," she says. "We don't feel like we're thin enough or pretty enough or smart enough or work hard enough ... We all are good enough and we look good enough and we are not our bodies, you know?"