katy herself is petty as hell ( she just fooled you all recently with her annoying relatable persona) so a diss track is like imminent at this point, besides she needs something to keep her on the headlines esp on her album releae date everyone's gonna be perched
might as well go out over the top & be super petty
how awful that she's announcing this on a Perfume chat. It's probably something like "we've moved onto some fresh producers and Go out and buy this perfume bye"