These are the chords I worked out to Rachel's rendition of the Backstreet Boys 
Classic that she performed at Judges Houses on X Factor. They sound pretty accurate to me.

Am (Intro)

Am         F C
You are my fire
    Am    F  C
The one desire
   Am        F  C
Believe when I say
     Am         F   C
That I want it that way

         F
Tell me why
                      G    Am
Ain't nothin' but a heart-ache
         F
Tell me why
                    G    Am
Ain't nothin' but a mistake
         F
Tell me why
               G       Am
I never wanna hear you say
     Am         F    E
That I want it that way

Am                       G
Now I can see that we're falling apart
     F                  G
But deep down inside of me...Woahhhhhhhhhhhh

    Am     F  C
You are my fire
    Am     F C
The one desire
   Am        F  C
Believe when I say
     Am         F    C
That I want it that way...
     Am         F    Am
That I want it that way...

Hope you enjoy these.
GO RACHEL!!!