Joy to the World was taken straight from the Bible by Isaac Watts in 1719. The music was added by American Lowell Mason in 1822. Handel was not involved!

Joy to the world! The Lord has come:
Let earth receive her King.
Let ev'ry heart prepare Him room,
And heav'n and nature sing, and heav'n and nature sing,
And heav'n and heav'n and nature sing.

Joy to the world! The Savior reigns:
Let men their songs employ,
While fields and floods, rocks, hills, and plains,
Repeat the sounding joy, repeat the sounding joy,
Repeat, repeat the sounding joy.

He rules the world with truth and grace,
And makes the nations prove
The glories of His righteousness
And wonders of His love, and wonders of His love
And wonders, wonders of His love.

MP3 for Joy to the World (that incorrectly claims Handel as the author)