This is my top ten:
1) Beyonce Knowles
2) Jennifer Lopez
3) Jessica Simpson
4) Carrie Underwood
5) Britney Spears
6) Christina Aguillera
7) Celine Dion
8) Jordin Sparks
9) Alicia Keys
10) Mariah Carey

I am all for the above list but I would like some additions, one would be Shakira and the other would be Kylie Ann Minogue. These two are also fantastic singers and awesome performers.