Justin Bieber’s electro-dance version of Michael Jackson’s “Slave 2 The Rhythm” has been pulled from the web after it leaked on Friday (Aug.16). The duet featured original vocals from the late king of pop and added vocals from the present prince of pop. Despite airplay on UK radio station Capital FM, the leak quickly raised authorization questions amid online fury and a petition from Jackson fans. “Slave 2 The Rhythm” was recorded by Jackson before his death in June 2009, surfacing online in December 2010. Either before or after the song’s leak (it differs in reports), Bieber took to Twitter to post several Jackson-centric tweets.