Will this song date me?

I would think this one would be easy but I can't find it anywhere. HELP?!?
The song has a wonderful dance beat and the words go like this:
"It’s a mystery, I cannot explain.
Only news I got are heartaches and pain.
Since she’s gone, gone, gone, gone, gone.
My baby’s gone.

I wonder wonder wonder
When she’s gone, gone, gone, gone.
My baby’s gone.

I can’t sleep at night.
Got no appetite
Everything is wrong, but used to be right.
Since she’s gone, gone, gone, gone, gone.
My baby’s gone.

I wonder wonder wonder
When she’s gone, gone, gone, gone.
My baby’s gone."

Any clue on title and artist and where I might find a copy?
Thanks

Date me it did.
It's Johnny Mathis, "Gone, gone, gone". It reached #15 in the UK in 1979.
WOW!
I apologize if anyone went on a tear trying to find this.
Thanks