From the recording Christmas Joy Medley
Due to copyright regulations, the lyrics will not be posted here. However, if you enter the name of any of these songs into a search engine on your computer, along with the word 'lyrics', you should find numerous relevant resources.
Lyrics
"Hark the Herald Angels Sing"
Words and music by Charles Wesley
"Go, Tell it on the Mountain"
Words and music by John Work, Jr.
"Joyful, Joyful, We Adore Thee"
Words by Henry van Dyke and music by Ludwig van Beethoven