an old unanswered request
The French song of lost love doesn't appear to be a version of Heavenly Blue, unless perhaps they are sung to the same air?

Youtube has another different song, recorded by Burton Cummings
Heavenly blue shade fallin' from a star

Is there no reason?
Heavenly blue eye glistening with a tear
Was it displeasin'?
Or was it just in season?
'Cause there was never anything to return to
No reason there for hangin' around
Nothin' you wer doin' could help me put both my feet back down on the ground
Now I'm heavenly blue, livin' with the ghost of you
Livin' with the ghost of you

and also a rock song performed by Kalafina