A Decade is Canadian alternative rock band Our Lady Peace's first compilation album, released on November 21, 2006, in Canada, and November 28, 2006, in the United States. Included on the album are top tracks "Where Are You", "Clumsy", "In Repair", "Somewhere Out There", "Innocent", "Thief", "Naveed", "Starseed" and "4 A.M.". Also included are the two unreleased songs "Kiss on the Mouth" and "Better Than Here".
The Canadian release of the album includes a bonus DVD containing a feature length concert/documentary directed by Rafael Ouellet and produced by Robi Levy featuring interviews with the current band members, behind the scenes footage, and performances of the songs "Picture", "Thief", "Innocent", "Where Are You", "Wipe That Smile Off Your Face", and "Clumsy" shot on November 6, 2005, at Massey Hall in Toronto. It also includes a photo gallery, and discography with lyrics.
"4am" and "One Man Army" have been remixed from their original album versions.
"In Repair" and "Life" appear with narration from Ray Kurzweil's book The Age of Spiritual Machines, which inspired the album Spiritual Machines, on which the two song were featured. The narration on "Life" was not issued on Spiritual Machines.
The first single from the album was "Kiss on the Mouth", released in Canada in September 2006.
The band has stated that this will be the last album featuring Saul Fox on the cover. Previously, Fox was seen on the covers of Our Lady Peace's first four albums.