This album, released in 2004 is a 4 cd and 1 dvd box set aptly titled the Ultimate collection as its such a large collection.

It features a wide range of songs from Michael's long career, including hits by the Jackson 5 and Jackson's as well as a couple from Michael's early Mowtown years as a solo artist.

Most of the songs are from Michael's adult career from albums "Off the Wall" through to "Invincible".

It also features a number of rare songs that were not previously available on cd and a number of demo songs of old hits as well as previously unheard songs.

There's also a live Dangerous concert dvd from 1992 which was originally broadcast by the U.S channel HBO. This dvd was later re-released on its own.

A Limited Edition Japanese version has 5 extra more tracks: "Blame It on the Boogie", "Human Nature", "Another Part of Me", "Heal the World" and "One More Chance". Only 20,000 of these were produced and are now a collectors item.