It was Lennon/McCartney Songbook night on Idol last night, and our quasi-local cutie pulled out a country version of "8 Days a Week." She looked nervous and uncertain of how it was going to go, despite her vocal prowess, which wound up iffy as a result. Witness: She looked super cute, of course, but then she opened her mouth and it wasn't stellar. It wasn't hideous, as Cowell called it, but it wasn't stellar. And,......