Fans who booked a 30-minute ride via the disruptive taxi alternative were the first to hear "Pretty Girls," which also features Iggy Azalea.

For the launch, Uber laid on specially decorated SUVs daubed with Spears’ name in and around LA. All fans had to do to hear the single was to request a ‘bee ride’ vie their app.

Once aboard, riders could listen to the song for up to 30 minutes.

Following the Uber-exclusive preview, the track is now available on iTunes.