Justin Bieber and Michael Jackson song leaks online

A new song by Michael Jackson featuring Justin Bieber has emerged online.

Slave 2 The Rhythm, recorded by the King of Pop shortly before his death in June, 2009, has been reworked to include vocals by the Baby hitmaker.

The pop sensation took to his Twitter.com page to pay tribute to the Thriller icon on Friday (16Aug13), minutes before the track surfaced on the Internet.

Bieber tweeted, "Excited for what is to come. MJ set the bar. Not only for music but for being an entertainer and how u treat the fans. Wish he was here..."

The song has already hit the airwaves in the U.K., where it was played on pop station Capital FM.