Adam Lambert and Allison Iraheta's duet a 'perfect marriage' 

"Adam Lambert and Allison Iraheta great together -- both have the voice, the edge, the energy of real rockers. And unlike Danny Gokey and Kris Allen, they actually play off each other, have some real chemistry..."
Keywords: american idol, season 8, top 4, allison iraheta, adam lambert, kris allen, danny gokey