These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: The Incredibly Strange Creatures Who Stopped Living And Became Mixed-Up Zombies
Big Lipped Alligator Moment: All of the musical numbers, but "Shook Out of Shape (Schick Out of Shave)" and "Choo Choo" in particular stand out. And I mean, stand out. These are sort of justified by the amusement-park cabaret setting, but plot-wise? Zilch. The main characters aren't even present for most of them. Given the quality of the story, however, this may not be such a bad thing, as they allow the audience to see less of the movie.
The ticket-selling monkey robot.
Ear Worm: " Shook Schick Out of Shape" is kind of catchy.
Hollywood Homely: Estrella is supposedly an ugly hag whom even a fat middle-aged drunk wouldn't deign to have sex with. She looks too much like Elizabeth Taylor to qualify as hideous, although that mole is a tad off-putting.
Padding: Lots of it. Ignoring the completely pointless song and dance numbers, there are also many extended shots of the amusement park as well as a very long and uneventful chase scene at the end.