Excluded from the track list is Twain's self-titled debut album, of which no songs were included.

Some songs are included in their pop versions such as "That Don't Impress Me Much" and "I'm Gonna Getcha Good!".

Three new songs were recorded specifically for the compilation and were all released as singles: "Party for Two" (featuring either Mark McGrath or Billy Currington), "Don't!

"I Ain't No Quitter" was one of Twain's least successful singles, becoming her first since "God Bless the Child" to miss the top 40 at US country.

Notably absent from the track list is Twain's 1993 self-titled debut album, of which no songs were included.

Twain recorded it as a duet with both Sugar Ray lead singer Mark McGrath and country musician Billy Currington.

The third and final song included on Greatest Hits is the pure-country "I Ain't No Quitter".

[8] It would reach its peak position of number 7 on December 25, 2004, becoming Twain's 16th and final top-ten country single to date.

[11] Internationally, the song reach the top ten in the United Kingdom, Austria, Denmark, and Canada.

[14] Twain did not promote the single at the time of its release, as she was battling Lyme disease and was unable to perform.

[20] Despite being seen as a potential summer anthem,[21] it became one of Twain's least successful singles in part due to lack of promotion.

The album was blocked from the number one spot by Eminem's Encore, which sold 710,000 copies in its debut week.

On the Top Country Albums chart, Greatest Hits immediately debuted at number one.

Greatest Hits spent eleven non-consecutive weeks at number one and was the best selling country album of 2005.

The album also cracked the top ten in Australia, France, Ireland, New Zealand, and Scotland.