Rihanna's single 'Umbrella' has remained at the top of the US Billboard chart for a second week.

The track, featuring Jay-Z, is already flying high with number-one spots in Ireland and the UK.

Little else changes on chart this week although Carrie Underwood's 'Before He Cheats' re-enters at 10 up from 12.

The top ten in full:

1. (1) Rihanna ft Jay-Z: 'Umbrella'
2. (2) Shop Boyz: 'Party Like A Rockstar'
3. (4) T-Pain featuring Yung Joc: 'Buy U A Drank (Shawty Snappin)'
4. (8) Fergie: 'Big Girls Don't Cry'
5. (3) Maroon 5: 'Makes Me Wonder'
6. (7) Avril Lavigne: 'Girlfriend'
7. (5) Daughtry: 'Home'
8. (6) Justin Timberlake: 'Summer Love'
9. (10) Huey: 'Pop, Lock & Drop It'
10. (12) Carrie Underwood: 'Before He Cheats'