Elvis's "One Night" is just about my favorite of his singles. But Fats's and his lyrics are different. In Fats's original, he's a repentent sinner. Elvis ain't never heard of no sin, as you'll see:

Fats's version:
One night of sin
Is what I'm now payin' for
The things I did and I saw
Would make the earth stand still

Don't call my name
It makes me feel so ashamed
I've lost my sweet helping hand
I've got myself to blame

Elvis's version:

One night with you
Is what Im now praying for
The things that we two could plan
Would make my dreams come true

Just call my name
And Ill be right by your side
I want your sweet helping hand
My loves too strong to hide