==Merger== 
 I absolutely agree. The new article should be The Definitive Collection (ABBA-album)   
 :Wikipedia:WikiProject Albums says "Do not pre-emptively disambiguate!", so the correct direction of the merge (which I have just completed) is to this article. —   

 There definitely needs to be a disambiguation page for "Definitive collection":  Donovan has one, so does the Partridge Family.  This one should also be "Definitive Collection (ABBA)".