No. 6: Michael Jackson

Michael Jackson and Justin Bieber have a lot in common, since they both started performing and reached superstardom at an early age. A collaboration would certainly make sense, and while Jackson’s 2009 passing makes such a duet impossible in person, surely the King of Pop has some unreleased gems sitting around in the archive that might make sense for Bieber to jump on. We think MJ would approve of teaming up with pop music's next young superstar.