Music
Rex Features
The American singer held off competition from The Pussycat Dolls and Jordin Sparks to retain the top berth.
Elsewhere, Australian popstar Sam Sparro climbed to fourth, while Hannah Montana actress Miley Cyrus held on to sixth spot.
The top ten in full:
1. (1) Katy Perry: 'I Kissed A Girl'
2. (2) The Pussycat Dolls: 'When I Grow Up'
3. (3) Jordin Sparks and Chris Brown: 'No Air'
4. (5) Sam Sparro: 'Black & Gold'
5. (4) Metro Station: 'Shake It'
6. (6) Miley Cyrus: 'See You Again'
7. (8) Chris Brown: 'Forever'
8. (7) Rihanna: 'Take A Bow'
9. (10) Coldplay: 'Viva La Vida'
10. (9) Sara Bareilles: 'Love Song'
Singles Reviews
Stooshe feat. Travie McCoy: 'Love Me' reviewThe trio breathe life into the girl band genre on their debut single.
The Sound
Big Time Rush's Valentine's Day playlistWe ask Big Time Rush for their all-time favourite love songs.
Music Interviews
Cher Lloyd: 'LA Reid loves scrambled eggs'Digital Spy finds out what the singer has been up to in America.
Album Reviews
The Ting Tings: 'Sounds From Nowheresville' reviewThe duo overcomplicate matters on their second studio album.
