Paula Abdul Sells, David Archuleta Sings On 'Idol' Finale Red Carpet

Plus: 'American Idol' alumni Jason Castro and Diana DeGarmo talk about working with new judge Kara DioGuardi.By Katie Byrne, with additional reporting by Jim Cantiello Paula Abdul on the red carpet at the "American Idol" Finale Photo: Steve Granitz/WireImage LOS ANGELES — The "American Idol" red carpet has to be especially surreal for all the returning "Idol" contestants, kind of like the first day of high school. The vets from the early seasons are the seniors, and the season-eight...

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