Who are the top ten american singers?

It depends on the category.

I will give you a list Top 10 best-selling ‘American Idols’

1. Carrie Underwood — 10.5 million albums sold
2. Kelly Clarkson — 10.4 million albums sold
3. Chris Daughtry — 5.3 million albums sold
4. Clay Aiken — 4.9 million albums sold
5. Ruben Studdard — 2.5 million albums sold
6. Fantasia Barrino — 2.3 million albums sold
7. David Cook — 1.3 million albums sold
8. Kellie Pickler — 1.2 million albums sold (tie)
8. Jordin Sparks — 1.2 million albums sold (tie)
10. David Archuleta — 962,000 albums sold

Tell me the category of the american singers you are searching and I'll give you my answer.