Rihanna Named No.1 Pop Star of the Decade by Billboard magazine

The hottest 100 pop stars of the decade based on sales were ranked by Billboard, and Rihanna came out on top. She has (34), the most chart appearances, (21) as the most top 10s and (9) as the most no. 1 hits.

1. Rihanna
2. P!nk
3. Britney Spears
4. Kelly Clarkson
5. Mariah Carey
6. Katy Perry
7. Usher
8. The Black Eyed Peas
9. Janet Jackson
10. Madonna

 11. Lady Gaga
12. Christina Aguilera
13. Justin Timberlake
14. NickelBack
15. Match box twenty
16. Beyonce
17. Backstreet Boys
18. Jennifer Lopez
19. Maroon 5
20. Avril Lavigne

 See BillBoard full list HERE