From Nielsen SoundScan (for the year-to-date):
Best-selling album: Frozen soundtrack (3,575,000)
Best-selling album by a female artist: Taylor Swift’s 1989 (2,496,000)
Best-selling album by a male artist: Sam Smith’s In the Lonely Hour (932K).
Best-selling album by a group or duo: Coldplay’s Ghost Stories (754K)
Best-selling song: Pharrell Williams’s “Happy” (6,371,000).
Best-selling song by a female artist: Katy Perry’s “Dark Horse” (featuring Juicy J) (4,376,000).
Best-selling song by a group or duo: Magic!’s “Rude” (2,888,000).
https://www.yahoo.com/music/musics-2...269618191.html