One of the best ideas to revive "American Idol" ratings, before producers decided to draft Jennifer Lopez and Steven Tyler, was to have a season of "Idol All-Stars," with previous winners returning to compete against each other. That was scrapped, reportedly the result of lack of interest from the more successful winners. But what if it actually happened?

Here's how we think the first 10 winners would rank:

1. Kelly Clarkson The original "Idol" is still the best. She has a distinctive voice that can handle a variety of styles well and is probably still the most likable of the group. So far, none of the winners has a signature hit as potent as "Since U Been Gone."

2. Carrie Underwood She comes close to Clarkson on nearly every score (and surpasses her on sales). Their battle would result in quite the finale.

3. David Cook He's the most inventive "Idol," by far, in terms of arranging and rearranging songs for his radio-friendly voice.