Adele has repeated her success of 2011 by once again having the year's top-selling album on iTunes.

Her album 21, which recently passed the 10 million mark in sales, topped the list for 2012 even though it was released in early 2011.

It remained popular this year, particularly after she won five Grammys in February.

Angry Birds Space was king of the top-paid iPhone and iPad apps, while those looking for freebies made YouTube the top iPhone app and Skype the most popular iPad app.

Elsewhere, the top-selling movie was The Hunger Games; the best-selling TV show was an episode of The Walking Dead from season three; and the top TV series purchased for a season was Downton Abbey season two.