Today's iTunes UK charts – correct at the time of posting (1pm) – are:
 
Singles:

1. Impossible – James Arthur
2. Scream & Shout (feat. Britney Spears) – will.i.am
3. Troublemaker (feat. Flo Rida) – Olly Murs
4. Gangnam Style - PSY
5. Locked Out of Heaven – Bruno Mars
6. I Knew You Were Trouble – Taylor Swift
7. Diamonds – Rihanna
8. Stay (feat. Mikky Ekko) – Rihanna
9. Try – P!nk
10. Die Young – Ke$ha

Albums:

1. Now That’s What I Call Music! 83 – Various ...