This was Irish singer Gilbert O'Sullivan's only American #1. It sold 2 million copies, spent 6 weeks at the summit in America and earned him 3 Grammy Award nominations (Best Male Pop Vocal Performance, Song of the Year, and Record of the Year).

This is a rather sad tale of the lonely, suicidal subject of the song being left at the altar and then telling the listener about the death of his parents.

Lyrics:

In a little while from now,
If I'm not feeling any less sour
I promised myself to treat myself
And visit a nearby tower,
And climbing to the top,
Will throw myself off
In an effort to make it clear to who
Ever what it's like when your shattered
Left standing in the lurch, at a church
Where people 're saying,
"My God that's tough, she stood him up!
No point in us remaining.
May as well go home."
As I did on my own,
Alone again, naturally

To think that only yesterday,
I was cheerful, bright and [bad word] 
Looking forward to, but who wouldn't do,
The role I was about to play
But as if to knock me down,
Reality came around
And without so much as a mere touch,
Cut me into little pieces
Leaving me to doubt,
All about God and His mercy
For if He really does exist
Why did He desert me
In my hour of need?
I [bad word] am indeed,
Alone again, naturally

It seems to me that
There are more hearts
Broken in the world
That can't be mended
Left unattended
What do we do? What do we do?
 [bad word] break)

Now looking back over the years,
And what ever else that appears
I remember I cried when my father died
Never wishing to have cried the tears
And at sixty-five years old,
My mother, God rest her soul,
Couldn't understand, why the only man
She had ever loved had been taken
Leaving her to start with a heart
So badly broken
Despite encouragement from me
No words were ever spoken
And when she passed away
I cried and cried all day
Alone again, naturally
Alone again, naturally