Judging by all the info we have about the video we can narrow the possibilities down to: "Walking On Ferst" and "This Is How Znake Does"
As much as I want WOA to be the next single, I fear about it's chart run, she can't afford another flop, not when we all want her to keep releasing singles from this alberm.
I remember soundgoldz posting something about a possible WOA release coinciding with the rerun of her SNL episode, but the first time the episode aired it did nothing to the song's position. On the other hand it is still charting on iTunes WW which is def. good.
TIHWD is def. not on my Top 16 songs off PRISM, but I think maybe the GP will probably like the beat and production? even if the lyrics are a mess, and I remember it climbing a lot when her Cover girl commercial aired. Hell they can even have a remix version with Iggy, that would be cool.
Either way both songs are produced by Klas and Max Martin so a change from her usual Dr. Luke sound right now will be great.