Where did Michael Jackson’s high-pitched, whispery speaking voice come from? Did he ever struggle with the massive weight of near-universal fame? How significantly, or even consciously, did he mourn a childhood stolen from him?  Also: did Janet Jackson actually exist?  If you'd like to learn all this and more … well, don't bother watching Antoine Fuqua's new biopic/hagiography, Michael . Because, instead of engaging with the fraught backstory of one of the most famous men to ever live, audiences get toe-tapping entertainment value and an impressive impersonation by nephew Jaafar Jackson at the expense of virtually any investigation into the mind and motivations of its eponymous star.…