We're Off to See the Wizard is from the 1939 film, The Wizard of Oz. The Chipmunks sang this in their album The Chipmunks Go to the Movies (should not be confused with the TV series).
Lyrics
The Chipmunks
We're off to see the Wizard
The Wonderful Wizard of Oz
We hear he is a wiz of a wiz
If ever a wiz there was
If ever, oh ever, a wiz there was
the Wizard of Oz is one because
Because, because, because, because, because
Because of the wonderful things he does
We're off to see the Wizard
The Wonderful Wizard of Oz!
Follow the Yellow Brick Road
Follow the Yellow Brick Road
Follow, follow, follow, follow, follow the Yellow Brick Road
Follow the rainbow over the stream
Follow the fellow who follows a dream
Follow, follow, follow, follow, follow the Yellow Brick Road
We're off to see the Wizard
The Wonderful Wizard of Oz
We hear he is a wiz of a wiz
If ever a wiz there was
If ever, oh ever, a wiz there was
the Wizard of Oz is one because
Because, because, because, because, because
Because of the wonderful things he does
We're off to see the Wizard
The Wonderful Wizard of Oz!