The promotional train for Justin Bieber’s new single ‘What Do You Mean?’ makes its way to a slower station today as the star has unlocked an acoustic version of the hit song.

Its release comes as a treat to fans who pushed the jam to #1 in numerous markets and helped him to push it the 21 million streams mark on Spotify in just five days!

Needless to say that this made the Biebs a very happy man.

Now watch express his joy with song below…

Your thoughts?