Music Week can today reveal the UK's most popular tracks and albums on iTunes in the past week.

According to Apple, the chart for the week October 14 – October 20, 2012 is:

Tracks:

1. Sweet Nothing (feat. Florence Welch) - Calvin Harris feat. Florence Welch
2. Don't You Worry Child [feat. John Martin] - Swedish House Mafia
3. Gangnam Style - PSY
4. Diamonds - Rihanna
5. Skyfall - ADELE
6. We Are Never Ever Getting Back Together - Taylor Swift
7. Standing in the Dark - Lawson
...