Heidi Fleiss enters the Celebrity Big Brother House at Elstree Studios on January 3, 2010 in Borehamwood, England.
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Source: Ian Gavan/Getty Images Europe)
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Heidi Fleiss is a current Maxim columnist and TV personality, but she came into international fame when she was busted as a Hollywood madam in 1997. She served 21 months in prison for tax evasion, centering around her prostitution ring. This isn't her first reality show, as she will be on the upcoming season of Celebrity Rehab. And, she's engaged to Moonlight Bunny Ranch owner Dennis Hof.