While Rihanna’s "Unapologetic" debuted at No. 1 on yesterday’s new U.K. album chart, the real sales story of the week, and the year, came in the less-publicised compilation chart, where "Now! That's What I Call Music 83" had the highest tally for any album in 2012. Singles-wise, English pop hitmaker Olly Murs upstaged Girls Aloud's reunion by beating them to No. 1 with "Troublemaker" featuring Flo Rida.
