Katy Perry Demo of Britney Spears' 'Passenger' Leaks Online
The song was produced by Diplo and co-written by Perry and Sia.
Perry's version has now leaked online, giving a taste of what the song would have sounded like delivered by a different pop star.
Had Perry decided to keep the song for herself, the timing and style seem to suggest it would have wound up on her chart-topping "Roar" and "Dark Horse"-featuring Prism album.
Listen to about two minutes of Perry's version here and then revisit Spears' version below.
Katy Perry and Sia's demo version of Passenger before they gave it to Brit Brit pic.twitter.com/P1Hq0tElfa— paul richard ---- (@paulboy) June 18, 2017