I am trying to find the title of a song that goes something like:

Long ago in the stable hay
A donkey cried in his donkey way
"I'm not beautiful, I'm not beautiful.
What good to anyone am I?"

Heaven cried, "Donkey,
you can carry,
Carry, Mary,
With angels as your guide."

Long ago on a Chrismas day,
The donkey sang in his donkey way,
"I feel beautiful, I feel beautiful,
As beautiful as anyone am I!"