There are far too many in the world to choose and official one that we all can agree on, but here is a list of a few I think are amazing:
Celine Dion
Mariah Carey
Toni Braxton
Aaliyah
Monica
Brandy
Jennifer Hudson
Kelly Clarkson
Aretha Franklin
There is not really an America's best female r&b singer.
Rihanna
One of them.
Katy Perry won favorite female singer in 2011.
This time in 2009 the best singer award in male was justin bieber and akon and in female singers Rihanna and selena gomes won the best female singer award.
Taylor Swift is the best singer in the world
Lily Ivanova
katty perry
helene fischer
Sunitha Nedungadi
Gloria Estefan
Mohit Chauhan (male) Rekha Bhardwaj (female) Kavitha Seth (female)