This went on for about a year, and Heidi describes how she watched as her aspiring model roommates either gave into partying or gave up and went home.

FORBES: Success Secrets of the Stars

But the following month, Berlusconi's second wife, Veronica Lario, filed for divorce -- alleging Berlusconi had an inappropriate relationship with an 18-year-old aspiring model whose birthday party he had attended.

CNN: STORY HIGHLIGHTS

Mr Berlusconi already has a credibility problem at home over his private life, having refused to make good his pledge to explain to parliament his relationship with an 18-year-old aspiring model.

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