Carrie Underwood!
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
joke..
In all seriousness though, I don't think anyone stands out as of yet. For Lady GaGa & Katy Perry we're going to have to see atleast another album drop with stable sales/hits & Rihanna.. I think she may dominate this decade if she releases a new album every year like she's use to. As well maybe Nicki Minaj & Taylor Swift will have their share of fame to.