"Moonglow" by Eddie DeLange (music by Will Hudson and Irving Mills) is a classic recorded by Tony Bennett, Billie Holiday, and Rod Stewart, and k.d. lang, among many others. Here's how the lyrics begin

It must have been moonglow, way up in the blue
It must have been moonglow that led me straight to you
I still hear you sayin', "Dear one, hold me fast"
And I keep on prayin', "Oh Lord, please let this last"

We seemed to float right through the air
Heavenly songs seemed to come from everywhere

And now when there's moonglow, way up in the blue
I'll always remember, that moonglow gave me you

Here is an instrumental performance by the Benny Goodman Quartet.