Pharrell Williams' "Happy" is the top-selling song of 2014 on iTunes. In a list released by Apple on Monday, Dec 8, the rapper/ singer/producer's massively successful single comes out at No. 1, besting other big hits of the year including John Legend's "All of Me" and Katy Perry's "Dark Horse" which sit at No. 2 and No. 3 respectively, AceShowbiz said.

Apple also unveiled on Monday that the "Frozen (2013)" soundtrack is the No. 1-selling album on iTunes store. The compilation featuring the Grammy-winning hit "Let It Go" by Idina Menzel rules the best-selling albums list which places other chart-toppers like Taylor Swift's "1989" at No. 2 and Coldplay's "Ghost Stories" at No. 3.

In Apple's Best-Ofs list, Beyonce Knowles gets the title of best artist while Swift's "1989" is the best album. The company also names Iggy Azalea and Charli XCX's "Fancy" the best song and British sensation Sam Smith the best new artist.