Shania Twain swept the country categories at the 14th annual Billboard Music Awards, held Wednesday (Dec. 10) at the MGM Grand Arena in Las Vegas. In addition to wins as country artist of the year and country albums artist of the year, Twain's latest project, Up!, was named country album of the year. The award winners reflect overall performance on the music trade publication's charts from December 2002 through November 2003. 12/11/03