Honestly haven't heard any of their music.
You must have heard House of the Rising Sun at least once in your life, haven't you?
As for Clay Aiken, I'm going to surprise a lot of people and say 1/10.
Sly and the Family Stone (in case no one can remember them, their most famous songs are Everyday People (featured in a Toyota commercial), Dance To The Music, and I Want To Take You Higher)