UP! includes 2 CDs: a "red" disc featuring a pop-electric mix plus a second "green" disc featuring a country-acoustic mix of the same tracks. UP! marks Shania Twain's emergence from a five-year hiatus that found her absconding to Switzerland and having a child with husband/producer/collaborator Robert "Mutt" Lange. As ever, Twain continues to be the master of the pop crossover. This time around, she takes 19 songs presents two different versions of each, divided between a pair of discs. CD 1 (the "Red CD") features more rock-flavored versions as opposed to CD2 (the "Green CD"), which includes considerably more pedal steel guitar et al.