When Mugatu is explaining to Derek why he wants him to campaign for him, Todd brings him a large coffee. Mugatu spits it out, with no foam mustache, and for a second a foam mustache appears. After Derek's surprised look, it disappears again.
When Zoolander is walking in the graveyard with Prewitt, they pass the same tombstone twice.
Almost at the end of the movie when Derek is about to leave Maury's office he hands his phone to Hansel for him to give it to Matilda. Hansel already has the phone in his hand and says "Ahh man!" but in the next take Derek gives him the phone again.
When Derek and his roommates are driving around drinking the Orange Mocha Frappucinos, the cups are unmarked, but the cup blown towards the camera by the explosion has a Starbucks logo.
Near the end of the movie Derek is in the dressing room wearing one kind of makeup, but when he's on the stage afterward it's a different kind.
Even though they can be requested, orange mocha frappuccinos aren't on the Starbucks menu and aren't orange.
When in the office, Archie tells Matilda that he emailed her some "NexisLexis" searches on models who appeared in Mugatu campaigns; the archive is actually called "LexisNexis".
When Derek is being interviewed before the Male Model of the Year Awards, the flashes of the photographers can be seen reflecting off the background/other people, yet when the camera *shows* the photographers with their cameras, the flashes of light do not come from the cameras themselves, but rather from above.
When Derek's friends are having the "gasoline fight", the bright orange liquid coming out of the gasoline nozzles is obviously not gasoline.
When Katinka gets out of the car to take Derek into the Day Spa, her jacket is folded up in back and you can see the liner of the jacket. It looks like the jacket is made of plastic and folded over when she was seated in the car.
Despite the filmmakers' best efforts to obscure/remove the World Trade Center towers following their destruction, they're clearly visible in at least one shot of the NYC skyline.
When Hansel and Derek are in Maury's office trying to get the files in the computer, Derek says that they will be no better than the machine. When he says this, his mouth is closed.
When Derek, Matilda and Hansel drink tea at the Hansel's place, Matilda reveals that she was fat kid in 7th grade. After that, Hansel moves his lips, but no sound is heard.
In the opening, one of the fashion cabal members asks Mugatu if he'd like to "go back to churning out novelty neckties." But none of them are actually speaking.
At the VH1 Fashion Awards, when Derek is walking up to get 'his' award, Hansel says, "Huh?" but his mouth doesn't move.
The shots of the rallies in Malaysia seem to show banners displaying Chinese text, while the Prime Minister's platform shows English and Arabic text. All of these are highly unlikely in the real Malaysia itself. The national and dominant political language of Malaysia is Malay, and is written in Romanized text due to Malaysia's past as a British colony.
A large premise of the movie is that Zoolander is unable to turn left, but he is seen doing that several times in the film: When Maury calls out to Derek at the red carpet for the award show; during the award show's montage (although this could be explained as the footage being flipped); when startled by J.P. Prewitt in the cemetery; when leaving the cemetery; and when Derek finishes talking to Matilda on the Walkie Talkie in Maury's office he turned left to go back to helping Hansel look for the computer files.
When Hansel is telling Derek about falling off a mountain he says "Hansel haven't you been smoking peyote for 6 straight days couldn't some of this be in your mind?". But the thing is you can't smoke peyote you can only ingest it.
When Derek is being hypnotized and Mugatu says India and a picture of India is shown, it is a picture of India before 1947, when Pakistan was a part of India.
At St. Adonis Cemetery, J.P. Prewitt states Abraham Lincoln was assassinated because he ended slavery, since it was slaves who made the powdered wigs and leggings. Both of these items were outdated by the 1860s.