Would they have any problems with the copyright licensing from the publishers of the music sections in that Star Wars Holiday Special?
They would have to clear each song I'm sure, as Lucas would only have a say on the Star Wars content right? ABC T.V. would have a say too I'm sure.

Marty Balin's over the top phallic lightsaber microphone had me rolling on the floor back in 78'.
But then again I was only 12 years old at the time.
FF