According to a very close source in the process of the new 5th Album (Hits) the Album will have 2 discs. The first disc will contain Britney's greatest hits along with some music videos (DVD), And the secound disc will contain 5 unrelased tracks, "justify my love", "shadow (spanish)", "chaotic", "tell me what ur sippin on", and an unkown track. The secound disc will also contain some remixes. Althogh the CD is still bieng put together these are the plans for how its gonna be but they are subject to change over time.
Thanks maximumbritney.com and truebritney.com