
I think gaga revisited Frankenstein in Perfect Celebrity.... (i have some evidences)
Gaga revisited some of her old songs while creating Mayhem
Garden of Eden and Private Audition
Zombiboy and Animal
Killah Pants and Fancy
And Perfect Celebrity and Frankenstein because
I remember very well that between 2015 and 2016 there was a short little part of Frankenstein's voice that seemed legitimate, and I saw it reappearing and being taken down due to copyright issues. If I remember correctly, it was the older little part of the song and some descriptions that matched each other.
The most legitimate relates ones said it had a sound similar to Gefalstein's Viol, I think that's how it's spelled. There was a post on Gagadaily that said it had a spoken introduction like Born This Way and a very redone production reminiscent of Born This Way, Judas, Bad Romance.
Current Rumors (some of a channel called Vortexx)
Although I don't quite believe the little part of the song he has, I partly believe a comment from someone whose little part of the song was taken down due to copyright issues. That description also mentioned two very interesting things: a part where Gaga sang "na na na na na na" like in "Perfect Celebrity," and a sample of "Viol," and the first few seconds of "Perfect Celebrity" sound like "Viol" if you compare the instrumentals.
Gaga said she revisited "Frankenstein" and discarded it, and Gaga may have used some parts of that song as a reference. Besides, "Mayhem" is also very disco, like the original LG5 seemed to be; Gaga really took advantage of the concept.