It was the best-selling album of 2011, and Adele's "21" is also the online music store's best selling album of 2012.

 

The Grammy-winning disc, which came out nearly 2 years ago continued to sell so strongly this year that it hit the 10-million sales mark.

The second-best-selling album of the year on iTunes is Taylor Swift's "Red", which has only been available since October.  On the song side, the best-selling track of the year was Carly Rae Jpsen's "Call Me Maybe", followed by Gotye's "Somebody That I Used To Know," Fun.'s "We Are Young," Maroon 5's "Payphone" and "Starships" by Ncki Minaj.