If you search, will find:
Since not sing Britney but her backing singer Myah Marie.
Many of her songs / demos have already been dubbed as Britney's only after fans announced the true owner of the songs, it was clear that the Britney-Imitation may sound really fucking for Britney.
Who does not want to admit the fact, the authorities should lead to heart where Britney uses and then compare times.
Listen - "Passenger (Acoustic) (by Nick * & Country Club Martini Crew) Britney Spears & Sia" and then some will be brought to light to YouTube easily.
Anyway, I'm disappointed that all was something feigned or will.