20. Jennifer Hudson
19. Lady Gaga
18. Britney Spears
17. Bruno Mars (OK, this can go off now...)
16. Adele
15. Maroon 5
14. Cee-Lo
13. Train
12. The Script
11. Pink
10. Avril Lavigne
9. Two Door Cinema Club
8. Grace Potter & The Nocturnals
7. My Chemical Romance
6. Mumford & Sons
5. Ke$ha
4. Foo Fighters
3. 30 Seconds To Mars
2. Sara Bareilles
1. Christina Perri
(Sad this will not be on anymore, but congrats on her reaching the 20/20 club)