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12. Roman and Irina Abramovich

Settlement Amount: $300 Million

In what had the potential to be the most expensive divorce settlement of all-time, Roman Abramovich's split with wife Irina only ended up costing the Russian billionaire $300 million. At the time (2007) Abramovich was listed by Forbes as the 16th richest man in the world, and it was speculated that his wife could be awarded up to half of her former husband's $18.7 billion net worth. Instead, she was awarded less than 2 percent of his fortune.

Don't feel bad for her, however, as assets are reported to have included cash, mansions in Britain and Moscow, a yacht and a private plane. Reports from the time note that Irina could have acquired more from Roman, citing a 50/50 split of wealth under Russian law, but she had not explicitly tried to get a larger chunk of his holdings.

Source: Reuters UK | Photo: Getty Images