Zane Lowe's Top 50 Rock 'N' Roll Stars

Rita Ora has topped the chart for a second week with her debut solo single 'R.I.P' featuring Tinie Tempah. Watch all the Top 40 videos...

The Saturdays have rocketed straight to the top of the chart with their new single '30 Days'. Watch the Top 10 vids...

R&B legend Usher has topped the chart with his new single 'Climax'. Watch the Top 20 videos...

We countdown the Official UK best selling songs from some of the world's biggest stars...