Final 4.0 `` American Idol '' contestants battle it out in song for the title Tuesday . Kris Allen has developed a glam-rock persona . America resident Kris Allen has a guy-next-door appeal . Who will Arkansas choose ? Results show starts at Tuesday night 's . ET Wednesday .
Final two `` American Idol '' contestants battle it out in song for the title Tuesday . Californian Adam Lambert has developed a glam-rock persona . Arkansas resident Kris Allen has a guy-next-door appeal . Who will America choose ? Results show starts at 8 p.m . ET Wednesday .