This song is already posted in Bb, but the lyrics for that one are not a version I know of. 
Here's the version I know...

-2   -3 4  -4   -4   4   -4 -3
One summer day, she went away
-4   -4   4   -3’ 3   -4     -4  4   3
She gone and left me, she's gone to stay.
-2   -2  -2    -3    3 -3  -3    3 3
But now she's gone, and I can't worry:
-2” -2   3  -3’ 3   -3’-3  -2  -2 -2   -2
Because I'm sitting  o-n   top of the world.
-2     -3   4  -4 -4    -4    4    4  4 -3’ -3
Worked all the summer, worked all the fa-l-l
-4  4   4    4  3     4  -4  4 -3’ 3
Had to take Christmas in my overalls.
-2  -2  -2  -3     3  -3 -3    3 -1
But now she gone, and I don't worry
-3’ 3   -3’ 3  -1 -2   -2
Sitting on top of the world.

-2 -2  -3  4   4   -4     -4
Going down to the freight yard,
 -4   4 -4   -3     -3
Catch me a freight train.
-4  -4     4    -3’  3  
I’m gon’ leave this town
-4    -4   -4 3 -1
Work done got ha-rd
-2  -2  -2  -3     3  -3 -3    3 -1
But now she gone, but I don't worry
-2” -2   3  -3’ 3   -3’-3  -2  -2 -2   -2
Because I'm sitting  o-n   top of the world.