In my personal point of view, i seriously dont think Taylor nor Kat should be in final. Whatever others may think, i believed some of u out there having the same thoughts as mine. Yes, theres no doubt Taylor can sing very well, an same goes to Kat but i think they are both 'boring'. I mean they kept singing the same concept of songs and to be an idol isnt singing ur favourite tune or whatever. In fact, an idol should not only know how to sing in one type of song, instead he/she should know how to sing in all sort of concepts. Besides that, stage performance is very important too, dont get tooooo carried away but maintain and entertain people. An idol should show its own attitude and must show the real personality of themselves, also dont pretend to be someone u're not (eg Kat), she smiles all times but its obvious that its all faken smile. If u see closer, i believe u will notice Kat would always get distraction before the song ends, this is a negative act for an idol.Also, her stage perfomance is poor compared to Taylor. She cant even dance or move her body, all she ever does is 'Sitting on the floor'. She dont even know how to use the stage. And Taylor, too mmuch of stage show, kept standing on the platform, singing in the crowd (although some liked it but some surely dont), always with the funny dance move that will never change for decades.
Anywayz, this is only my own personal thoughts, from what i observed since the beginning, this is the worst American Idol finalists i've ever seen and it doesnt make any sense at all. I only enjoyed the 'humor' and Clay is good.
U may add on some critism here,nothing serious. Im sure the fans of Taylor or Kat would condemn my thoughts but doesnt really matter to me.
I still think some other contestants are much more better than them and their journey will not end after the termination.

God Bless.