The Collector's Series, Volume One is a primarily English-language compilation album by Canadian singer Celine Dion, released by Columbia Records and Epic Records on 23 October 2000. The album was issued in France under the title Tout en amour (). It includes a selection of hits absent from Dion's first English-language greatest hits album, All the Way... A Decade of Song, album tracks, and songs previously unreleased on Dion's albums in certain territories. The album has sold more than three million copies worldwide.
The album includes "The Power of the Dream" from the opening ceremony of the 1996 Summer Olympics and songs in French, Spanish, and Japanese. It also contains singles that were not included on Dion's previous greatest hits album, All the Way... A Decade of Song: "Where Does My Heart Beat Now", "Only One Road", "Falling into You", "Tell Him", and "The Reason".
Tout en amour was also released in France as a limited edition, including 12 colour postcards with previously unreleased photos of Dion. The album was reissued in October 2004 in select European countries as part of the Best of the Best Gold series. The gold-disc pressing was housed in a die-cut slipcase, exposing the gold disc, and included the same tracks as the standard edition.
According to Stephen Thomas Erlewine of AllMusic, The Collector's Series, Volume One filled the gaps left by Dion's hits collection All the Way... A Decade of Song, including duets, French and Spanish recordings, and tracks previously unavailable in the United States. He questioned why the album was not composed solely of rarities, which he felt would have served the release better than what he described as a "mixed bag".
The Collector's Series, Volume One has sold more than three million copies worldwide. It topped the compilation albums chart in France and reached the top 10 in Canada and Portugal, and reached the top 40 in most other countries where it charted.
In the United States, the album debuted at number 28 on the Billboard 200, selling 36,000 copies in its first week. According to Nielsen SoundScan, it has sold over 914,000 copies in the US.