TOP 10 POP ARTIST 2011

1. Katy Perry

2. Rihanna 

3. Bruno Mars

4. Britney Spears

5. Lady Gaga

6. Pitbull

7. Adele

8. Ke$ha

9. P!nk

10. The Black Eyed Peas

*for complete chart : klik http://www.billboard.com/#/charts-year-end/hot-pop-songs-artists?year=2011