With these being the top 20 best selling albums of all time, chances are you have some of them in your collection...most are rock albums, but there's a stray Madonna and Celine Dion in there too....and you'll see the Saturday Night Fever soundtrack as well, and (yikes) ABBA's greatest hits is in there too....but here ya go, PastFactory.com's list of the top 20 best selling albums ever, in order, with info about each.