I've never heard anything by Johnny Mathis.

I occasionally trundle out When a Child is Born, though I tend to sing it to the melody of Mutton Pie (as sung by Jim Eldon) so maybe it don't count...

Its all a dream and illusion now
It must come true, sometimes soon somehow
All across the land dawns a brand new morn
This comes to pass when a child is born

With the fol-the-diddle di-do, fol the diddle-dee!