I think it's interesting that all the material from the sessions that was placed on the album configuration was from the later sessions which included Wendy, Lisa and Jonathan, non of which is widely circulating (except for the clip of Junk Music in UTCM).

The earlier sessions which U Gotta Shake Something is from is almost a skeletal or proto-SOTT/Lovesexy band, and in my mind it always kind of reminds me of the New Power Trio and The Undertaker, how you have Prince using a more stripped back band lineup to record something quite unique.

This is totally unrelated to "Shake" from GB right?

WAAAAAYYY not related. Its a big long 15 minute party jam with Levi Sheila Prince and Eric..not too far to be a cousin from a Madhouse production, but this is more funkier than that...and it has a live feel to it because there is a sampled audience in the background and prince sayin random things. Look 4 it.