"I didn't realise that getting into the Playboy world was a dangerous choice," says Holly Madison.

The 41-year-old television personality dated Playboy founder Hugh Hefner for seven years. She appeared on the reality show The Girls Next Door, which followed Holly, and Hugh's other two girlfriends, Kendra Wilkinson and Bridget Marquardt, who lived with him in the Playboy Mansion.

Holly appears in a new documentary, Secrets of Playboy, which will shed light on the hidden truths of the Playboy empire.