''Greatest Hits'' is a greatest hits compilation album by Shania Twain, released in 2004 (see 2004 in music). The album contains 21 tracks from her three Diamond albums ''The Woman in Me'', ''Come on Over'' and ''Up!''. Also included are three new songs: "Party for Two" which hit the top ten at country in the U.S. and top ten in UK and Germany, the ballad "Don't!" and "I Ain't No Quitter".
''Greatest Hits'' finished 2005 as the highest selling country album in the U.S.. As of November 17, 2006 the album has sold approximately 3,540,000 million retail units in the United States. According to her official myspace, Shania Twain's ''Greatest Hits'' has sold more than four million copies in the US. As of April 17, 2008, the album has been certified 4× platinum in the US. It received a second platinum certification in the UK on December 17, 2004 It has sold about 7 million worldwide
''Greatest Hits'' debuted at number two on the Billboard 200 with 530,000 copies sold
The album stayed at #1 on the Billboard Top Country Albums chart for 11 consecutive weeks.