Rihanna holds J.Lo off Aussie top spot

Rihanna has retained her lead on the ARIA singles chart.

The singer spends a fourth week at the chart summit, fending off competition from Jennifer Lopez's 'On The Floor', which climbs from ten to two.

Elsewhere in the top ten, Lady GaGa's 'Born This Way' completes the top three, and Bruno Mars's 'The Lazy Song' vaults from 44 to number ten.

Further down the chart, Ke$ha leaps from 20 to 13 with 'Blow', Lupe Fiasco's 'The Show Goes On' advances from 19 to 14, and Jessie J's 'Price Tag' lands at 22.

Dr Dre, Eminem and Skylar Grey's 'I Need A Doctor' shifts from 39 to 27, and Panic! At The Disco's 'The Ballad Of Mona Lisa' is a new entry at 39.

The top ten singles in full (click where possible for our reviews):

1. (1) Rihanna: 'S&M'
2. (10) Jennifer Lopez ft. Pitbull: 'On The Floor'
3. (2) Lady GaGa: 'Born This Way'
4. (3) The Black Eyed Peas: 'Just Can't Get Enough'
5. (4) Diddy-Dirty Money: 'Coming Home'
6. (5) Alexis Jordan: 'Happiness'
7. (7) Avril Lavigne: 'What The Hell'
8. (6) Wynter Gordon: 'Dirty Talk'
9. (8) Usher: 'More'
10. (44) Bruno Mars: 'The Lazy Song'