"leaving London in CHRISTOPHER KANE it was lovely mayhem as always, Sire"

https://www.instagram.com/p/-gkIwfpFJy/

"Sire" is a track she originally recorded in 2012, is this our next hint at lg5?

Sire is a form of address for reigning kings in the United Kingdom and in Belgium. It has also been used in France, Italy, Germany, Portugal, Sweden and Spain.

Maybe DJWS wasn't the right producer for Sire and that's why it was never on Artpop and maybe she found the right producer now in Mark Ronson or whoever else