Adele has been crowned the queen of iTunes for 2011.

Bosses at the online download website have named the British singer's album 21 as its 2011 bestseller, while her Rolling in the Deep is the bestselling song.

Folk act Mumford + Sons' have come in second among the bestselling albums with Sigh No More, while the deluxe edition of Lil Wayne's Tha Carter IV is third.

LMFAO's Party Rock Anthem is the second biggest iTunes pop hit of 2011 and Katy Perry's Firework is third.

Meanwhile, The Social Network was the most-downloaded movie of the year at iTunes. Walter Isaacson's Steve Jobs biography was the bestselling book.