Well, it seems this big sis wasn't having any of it!
Koko took to Twitter on Monday with a very cryptic message about all the "sh*t", writing:
[Image via Instagram.]
But yes, YES, it did happen!!! There might not have been any cupcake bras or schoolgirl skirts, but it friggin' happened!
Katy revealed that not only is Brit Brit rockin' the Ooh La La song for Smurfs 2, but Katy is also on the song, which is pretty much blowing our pop minds into tiny bits of glitter!
"Me and Bonnie [McKee] secretly did some background vocals on that song. So maybe listen for our voices."
Um, we will totes tune in!
But more importantly…can we expect a real collaboration between the pop princesses?? Like one with a music video and all? And maybe an awards show performance together?
[Images via Joel Ginsburg/FayesVision/WENN.]