>It doesn't matter why. Just pick one from each group:
>
>More than 250m albums sold:
>

>Michael Jackson

>
>200 to 250m albums sold:
>
>Mariah Carey

>
>120 to 200m albums sold:
>
>Rihanna

>100 to 100m albums sold:
>

>Stevie Wonder

>80 to 100m albums sold:
>

>Santana

>
>75 to 80m albums sold:
>

>Bob Marley