The top 13 contestants reunite; the winner is revealed.

The last two finalists perform.

One contestant is eliminated; Katy Perry performs; former "American Idol" winner Jordin Sparks performs.

The remaining three finalists perform two songs each - a personal selection and a song chosen by the judges.

One contestant is eliminated; No Doubt performs; Daughtry performs.

The remaining finalists perform; guitarist Slash mentors the contestants as they prepare rock songs.

One contestant is faced with elimination; former "American Idol" winner Taylor Hicks performs a song from his latest album.

The remaining contestants perform standards made famous by members of the Rat Pack.

Two contestants are eliminated; former contestant David Archuleta performs; disco stars Harry Wayne Casey (KC and the Sunshine Band), Thelma Houston and Freda Payne perform a medley of... Full summary

The remaining contestants perform songs of the disco era.