The Lead single from her Second Album 21 has now achieved 3 weeks at the top the chart and beats Katy Perry and Pitbull to the top of the chart.

Their Singles E.T and Give Me Everything land at 2 and 3

Also in the Top Ten This Week are Jennifer Lopez On The Floor which is up 1 place to number 5 from last week's number 6 entry

Party Rock Anthem by LMFAO vaults from 20 to 8 this week 

Lady Gaga's latest Promo Single Hair debuts at number 12 and Kelly Rowland's Motivation finally breaks the top 30 and lands at 26

The Top 10 singles This Week

1. Adele - Rolling In The Deep 
2. Katy Perry Featuring Kayne West - E.T
3. Pitbull - Give Me Everything
4. Black Eyed Peas - Just Can't Get Enough
5. Jennifer Lopez - On The Floor
6. Bruno Mars - The Lazy Song
7. Britney Spears - Till The World Ends
8.  LMFAO - Party Rock Anthem
9. Lupe Fiasco - The Show Goes On
10. Chris Brown ft. Lil Wayne and Busta Rhymes: 'Look At Me Now'