Oprah Where Are They Now:
Before she was old enough to drive, Melissa Joan Hart landed her first starring role in the Nickelodeon series Clarissa Explains It All. Then, when she was 20 years old, Melissa began starring in the hit series Sabrina, the Teenage Witch. Although she had a good-girl image, Melissa admits to partying in her 20s in her tell-all book, Melissa Explains It All: Tales from My Abnormally Normal Life. Watch as she opens up about a wild night at the Playboy Mansion, which led to the "least professional" moment of her career.
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