Charts
| Chart (2009) | Peak position |
|---|---|
| Australia (ARIA) | 24 |
| Austria (Ö3 Austria Top 40) | 37 |
| Belgium (Ultratop 50 Flanders) | 49 |
| Belgium (Ultratop 50 Wallonia) | 29 |
| Canada (Canadian Hot 100) | 9 |
| Czech Republic (IFPI) | 31 |
| Denmark (Tracklisten) | 28 |
| European Hot 100 Singles | 13 |
| Germany (Media Control AG) | 30 |
| Ireland (IRMA) | 2 |
| Netherlands (Dutch Top 40) | 8 |
| New Zealand (RIANZ) | 1 |
| Norway (VG-lista) | 11 |
| Slovakia (IFPI) | 16 |
| Sweden (Sverigetopplistan) | 11 |
| UK Singles (Official Charts Company) | 5 |
| US Billboard Hot 100 | 3 |
| US Hot R&B/Hip-Hop Songs (Billboard) | 1 |
| US Pop Songs (Billboard) | 3 |
Read more about this topic: Knock You Down
Famous quotes containing the word charts:
“There’s one basic rule you should remember about development charts that will save you countless hours of worry.... The fact that a child passes through a particular developmental stage is always more important than the age of that child when he or she does it. In the long run, it really doesn’t matter whether you learn to walk at ten months or fifteen months—as long as you learn how to walk.”
—Lawrence Kutner (20th century)