Kris Allen's smooth vocals and boy-next-door image propelled him to "American Idol" victory Wednesday, turning the theatrical powerhouse Adam Lambert into the most unlikely of also-rans."I'm sorry, I don't even know what to feel right now. This is crazy," said a stunned Allen, 23, of Conway, Ark.As host Ryan Seacrest said in announcing the result of the viewer vote, "The underdog, the dark