Coldplay’s fourth album was the best-seller for 2008 said IFPI (International Federation of the Phonographic Industry).
Well. Unfortunate for them, they have been pirated (they are on the list of bands in the Spectrial)! So people have been downloading their music for free! It’s reasonable to assume that had they not been pirated, these 6.8 million units world-wide would rather have been 10 MILLION BILLION.