20 Incredibly Hot Mistresses of Celebrities

5. Oksana Grigorieva – Mel Gibson

Oksana Grigoreva is just one woman in a string of bad decisions made by Mel Gibson. This one could have arguably been his most costly. He had been married to his wife for 26 years and they had 7 children together when he started a relationship with Oksana. The relationship was the last straw for his wife, who filed for divorce and managed to take half of his net worth in one of the most expensive celebrity divorces in history.