Katy Perry's demo of "Passenger" leaks online!



The song was written by Britney Spears, Sia Furler, Katy Perry, Andrew Swanson and Diplo.

Official "Britney" version:


Acoustic remix with Sia's vocals:



SOURCES: 1, 2 , 3

Who did the chorus justice, ONTD?

Katy Perry
31(36.0%)
Myah Marie
38(44.2%)
Sia
17(19.8%)