Brandon Blackstock's loved ones gathered together in Montana to celebrate his life days after he lost a three-year battle with cancer. "Brandon's closest friends and family gathered over the weekend for a few days to celebrate his life in the place he loved most. It was very private," a source exclusively tells Us Weekly. "His partner, Brittney [Marie Jones], his family and his closest friends spent time at his home sharing memories of Brandon and remembering how much he meant to them.