Actually, it's Tommy Cash who sings this. It was written by Don Reid of the Statler Brothers.

From http://www.luma-electronic.cz/lp/c/Casht/cash_t_riseandshine.ht

ONE SONG AWAY
(Don Reid)

I'm just one song away from bein' home
I'm one song away from bein' home
I've got one more verse to do
and if the crowd'll let me through
I'm just one song away from bein' home
 
Every hotel clerk looks like the last
And most girls are just waiting to be asked
Every town looks the same
And there's no more new names
And the future looks worse than the past
But I'm just one song away...
 
All the words to my songs lose their meaning
All the dressing rooms seem to need cleaning
Every town has different weather
All the days run together
But I have to smile and knock out my routine
But I'm just one song away...
I'm just one song away...