"Popstar" is all too familiar, and its wit is a bit too little, too late

After numerous mockumentaries from the last few decades - or should I say, "rockumentaries" - Popstar: Never Stop Never Stopping arrives at the scene tardy by just too many decades, even if its subject matter is rather contemporary.  I can't honestly recall another such genre film that was actually funny other than the one Rob Reiner directed that started it all way back in 1984, This is Spinal Tap.  But not only are the jokes stale (the only one at which I laughed out loud is a song called Fuck Bin Laden, which is hysterical in more ways than one), the subject matter, which is clearly based on Justin Bieber's over-the-top-lifestyle, is redundant: we don't actually need a movie to spoof Bieber, for his life already is a joke among most adults the world over, despite his high financial success.  Result is a movie that feels too long even at mere 80-plus minutes.  Andy Samberg continues to appear in below average films, both commercially and critically, and I suppose he always has his TV success to fall back upon.  Honestly, most people with his poor big screen track record should feel lucky to still be employed, regardless of the medium.
C