Instead of clawing at the soul-sucking nature of bad pop music (a la Bo Burnham’s marvelous five-minute track “Repeat Stuff”), “Popstar” makes easy jokes about weed and poop and vacuous celebrities in a way that’s more “ Zoolander 2 ” than “Zoolander.”
This cameo-stuffed mockumentary tries to be the next Zoolander, but it's more of a vanity project for Andy Samberg and his cohorts in the comedy trio the Lonely Island (aka Akiva Schaffer and Jorma Taccone, who codirect; all three wrote the script and act in the film).
Although it’s easy to see the Spinal Tap influences in Popstar, a better comparison might be Ben Stiller’s Zoolander .
Personally, I think “Zoolander,” which got mixed reviews, was brilliant, but I couldn’t stand “Anchorman,” “The Hangover” or “Dumb and Dumber,” all massive hits.
Yet the gags aren’t excruciating, as in “Zoolander 2,” a movie equally dependent on sudden celeb cameos and general wackiness.