Mockingbird is a song written by Inez and Charlie Foxx, based on the lullaby Hush, Little Baby in 1963.

Mockingbird lyrics

Hush, Little Baby verse

Apparently there are a variety of versions of Hush, Little Baby. ONe my parents used to sing included,
Hush, Little Baby don't you cry
Mama's gonna make you an apple pie,
If that pie don't bake,
Mama's gonna make you a chocolate cake,
If that chocolate cake don't rise,
... Can't remember the rest.
Weird. I can't find that version anywhere.