In the old song Justified and Ancient but the Klf and tammy winette are they sayign "its a moo moo" in the back ground and is this a refference to the I Love lucye episode there lucy and ehel dress as martians on top of theempire statebuilding and utter the line Its a moo moo? They are singing "Mu Mu"
The KLF's slogan was "The Justified and Ancients of Mu Mu" often shortened to JAMs (which is also mentioned in the song "stand by the JAMs") and was more often than not featured in their songs in some way.
The background vocals you're speaking of are "Justified" in parts and..."Ancients of Mu Mu"
Hope this helps :o) | 