More than just a love triangle. Shania Twain's 14-year marriage to music producer Robert "Mutt" Lange came crumbling down when she found out that her best friend Marie-Anne Thiebaud and Lange had fallen for each other in 2008. The couple eventually divorced in June 2010. "It was like I was kicked off my own bus while it was moving full speed," the Grammy winner told Redbook magazine in April 2011 of the affair. Twain then remarried Marie-Anne's ex-husband Frederic Thiebaud in 2011.