‘American Idol’ finale show

Paula Abdul gives Simon Cowell a kiss as they greet each other during the finale of “American Idol.”

  (Kevork Djansezian / Associated Press)

Simon Cowell is seen with fans during the season finale of “American Idol.”

  (Mark Mainz / AP Images for Fox)

David Cook performs the song “Hero” during a duet with David Archuleta.

  (Kevork Djansezian / Associated Press)

David Archuleta performs the song “Hero” during a duet with David Cook.

  (Kevork Djansezian / Associated Press)

David Archuleta, left, and David Cook smile after they performed the song “Hero.”

  (Kevork Djansezian / Associated Press)

Ryan Seacrest, right, bows to Mike Myers, who is dressed as the character Pitka from his upcoming movie, “The Love Guru.”

  (Kevork Djansezian / Associated Press)

Former contestants, from left, David Hernandez, Chikezie , Jason Castro, and Michael Johns perform during the finale of “American Idol.”  (Kevork Djansezian / Associated Press)

Syesha Mercado and Seal perform the song “Waiting For You.”

  (Kevork Djansezian / Associated Press)

Carly Smithson and Michael Johns perform the song “The Letter.”

  (Kevork Djansezian / Associated Press)

Carrie Underwood performs the song “Last Name.”

  (Kevork Djansezian / Associated Press)

Brooke White performs with Graham Nash from Crosby Stills Nash & Young.

  (Kevork Djansezian / Associated Press)

David Cook performs the song “Sharp Dressed Man” with ZZ Top’s Frank Beard on drums and Billy Gibbons.

  (Kevork Djansezian / Associated Press)

Donna Summer performs during the finale of “American Idol.”

  (Kevork Djansezian / Associated Press)

Carrie Underwood performs at the “American Idol” 7th season finale.  (Frank Micelotta / Getty Images / Fox)

David Cook is congratulated by his “Idol” peers. Frrom left, David Archuleta, Carly Smithson, Cook and Michael Johns.  (Mark Mainz / AP / Fox)

David Cook perfoms after winning on the 7th season of “American Idol.” In the background, runner-up David Archuleta shakes hands with the judges.  (Kevork Djansezian / Associated Press / Fox)