One interpretation of VIY that I had is that it could be Stefani (the ghost of her past) singing to Gaga (the living present). I love how many layers of meaning the song has.
I would love a setlist like this:
Shadow Of a Man
Sheiße
Disease
Perfect Illusion
Pokerface
Garden of Eden
Bad Romance
Zombieboy
Bloody Mary
Vanish Into You
The Beast
Shallow
Die With a Smile
Born This Way
Paparazzi
Perfect Celebrity
Applause
Rain on me
Judas
Marry The Night
Abracadabra
I wonder if the discrepancy we saw about the track length of perfect celebrity is a hint that perfect celebrity will be re-released with a Beyoncé feature as the continuation to Telephone?