The song that made me decide to change the theme this week away from instrumentals was this: Hocus Pocus by the Dutch band, Focus. Technically, there are no lyrics in Hocus Pocus; the song is in the musical form known as a rondo. Here, the vocal parts are yodeling (for which the song is famous) and gibberish, alternating with the power guitar riff.
Hocus Pocus was released on the 1971 album, Moving Waves. This video comes from a 1972 broadcast of the Old Grey Whistle Test. (There is another version of this video at Youtube without the announcer appearing at the beginning and end, but the visual quality is quite poor.)