Who are the best 2012 female singers?

Here are some of the best 2012 female singers:

1. Adele

2. Taylor Swift

3. Rihanna

4. Katy Perry

5. Nicki Minaj

6. Beyoncé

7. Jennifer Lopez

8. Lady Gaga

9. Sia

10. Lorde

11. Shakira

12. P!nk

13. Christina Aguilera

14. Kelly Clarkson

15. Alicia Keys

16. Bruno Mars

17. Ed Sheeran

18. Sam Smith

19. Imagine Dragons

20. Justin Timberlake