"On the Hills and Everywhere" had just one song:
  - Go Tell It On the Mountain

Go Tell It On the Mountain

"I was a powerful sinner,
I sinned both night and day,
Until I heard the preacher,
And he taught me how to pray:"

"Go tell it on the mountain,
Tell it on the hills and everywhere,
Go tell it on the mountain
That Jesus Christ was born!"

Easily one of the most well-known songs of the series, "Go Tell It On the Mountain" was probably the first song on most reader's minds when they saw the title of this story. This is another song well known enough that I don't feel the need to link anything.