ALBUM SALES

With 15.7 million albums sold (according to Nielsen Music) since winning season four, Carrie Underwood is the ultimate Idol success story. Her secret? "The right records," says Urban.

BILLBOARD NO. 1s

Season-one winner Kelly Clarkson rules the charts, having topped 98 tallies (counting all national, domestic music charts compiled by Billboard) since her debut in 2002.

DIGITAL SONG DOWNLOADS

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