Katy Perry retains Aussie No.1

US singer Katy Perry has retained the Australian singles chart number one.

The Pussycat Dolls climbed to second with new single 'When I Grow Up', while Jordin Sparks slipped to third with 'No Air'.

Elsewhere, there were new entries in the top ten for Metro Station at four and Sam Sparro's 'Black & Gold' at six.

The top ten in full:

1. (1) Katy Perry: 'I Kissed A Girl'
2. (3) The Pussycat Dolls: 'When I Grow Up'
3. (2) Jordin Sparks and Chris Brown: 'No Air'
4. (25) Metro Station: 'Shake It'
5. (17) Sam Sparro: 'Black & Gold'
6. (8) Miley Cyrus: 'See You Again'
7. (4) Rihanna: 'Take A Bow'
8. (9) Chris Brown: 'Forever'
9. (6) Sara Bareilles: 'Love Song'
10. (5) Coldplay: 'Viva La Vida'