Robert “Mutt” Lange is no longer still the one for Shania Twain. The country/pop superstar and her music producer husband are splitting after 14 years of marriage, her rep confirms to OK!. “Shania Twain and her husband, music producer Robert “Mutt” Lange, are separating after 14 years of marriage,” Jason Owen tells OK!. “This is a private matter and there will be no further comment at this time.” The 42-year-old singer met Mutt when he was recruited to work on her album in the early 1990s. They married on December 28, 1993 and have a 6-year-old son, Eja D’Angelo. At...