Why Do Some 'American Idol' Stars Succeed While Others Disappear?

Did you ever notice how some contestants who win American Idol seem to fall off the face of the planet after the season is over? Then there are other "Idol" winners who become huge successes. So why does this happen?

There's no doubt about it, Carrie Underwood and Kelly Clarkson are not only beautiful but extremely talented. Carrie Underwood covered Heart's "Alone" during one of the "Idol" episodes, and it was such an amazing performance that Simon Cowell said to her, "I'm going to make a prediction: you are not only to win this competition, but you're going to sell millions of records". And she did just that.

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