Reason is Melanie C's second album, the follow-up to Northern Star. Released on 10 March 2003, it reached #5 in the UK album chart - selling 30,876 copies in its first week. Although not performing as well as Northern Star, Reason has a Gold certification in the UK, with 101,889 copies sold. The album has sold 500.000 copies worldwide
This album has been released with the Copy Control protection system in some regions.