TOP UK SINGLES OF 2009
1. Lady GaGa (above) - Poker Face (Genre: pop)
2. Black Eyed Peas - I Gotta Feeling (hip-hop)
3. Lady GaGa - Just Dance (pop)
4. Cheryl Cole - Fight For This Love (pop)
5. Joe McElderry - The Climb (pop)
6. La Roux - In For The Kill (pop)
7. Black Eyed Peas - Boom Boom Pow (hip-hop)
8. Rage Against The Machine - Killing in the Name (rock)
9. Alexandra Burke ft Flo Rida - Bad Boys (pop)
10. Black Eyed Peas - Meet Me Halfway (hip-hop)
Source: BPI/Official Charts Company
Lady GaGa, Cheryl Cole and La Roux have helped pop overtake rock as the best-selling music genre in the UK.
Some 33.5% of singles sold in 2009 were classed as pop by the Official Charts Company (OCC) - up from 28% in 2008.
A further 18.9% were R&B, including JLS, Beyonce, Dizzee Rascal under the OCC's guidelines. Almost 9% came from hip-hop acts like the Black Eyed Peas.
But rock's share slumped from 31% to 24.5% - led by Rage Against the Machine, Kings of Leon and Kasabian.
Geoff Taylor, chief executive of record label body the BPI, said: "There's no doubting that 2009 was a vintage year for pop - some fantastic records led to a strong performance by the genre in both albums and singles.
"British urban talent shone in the R&B sector, virtually doubling their sales last year thanks to Tinchy Stryder, Dizzee Rascal, Chipmunk, N-Dubz and Taio Cruz."
In the albums market, acts classed as pop took 29%, up from 25% the previous year, with R&B on 9.6%.
Rock's share fell from 35.7% to 31%, with Kings of Leon's Only By The Night the only rock album to sell more than a million copies.