Listen to Justin Bieber and Michael Jackson song 'Slave to the Rhythm' 

A Michael Jackson song featuring vocals from Justin Bieber has leaked online, titled 'Slave To The Rhythm", after Biebs took to Twitter on Friday to hint that something exciting was about to be revealed.

The track surfaced (August 16) and has already had its first play on Capital FM.

Michael is said to have recorded the track before he died in June 2009 and it's recently been updated to include guest vocals from Justin.

Bieber’s Twitter didn’t provide much in the way of answers, but he did tease that something big was on the way that may or not involve the King of Pop. “Excited for what is to come,” he wrote Friday. “MJ set the bar. Not only for music but for being an entertainer and how u treat the fans. Wish he was here…”

listen: