The cast of “Glee,” belting out a number in “Glee: The 3D Concert Movie.” (Twentieth Century Fox)

Glee” is an unstoppable, show-choir-celebrating, pop culture machine. As a consequence, “Glee: The 3D Concert Movie” has arrived in theaters today, bringing with it the chance to finally have Kurt, Rachel, Finn and Blaine shoved in your face literally instead of just metaphorically.

Actually, the performances in the film — captured at a “Glee” concert tour stop earlier this summer at the Meadowlands — are pretty entertaining, even if the film itself seems a little unnecessary. (Here’s my full review of “Glee: The 3D Concert Movie” for your reading pleasure.)

Many of the show’s signature pop covers — “Don’t Stop Believin,’ ” the spare version of “I Want to Hold Your Hand” that Kurt (Chris Colfer) dedicated to his ailing dad, Brittany S. Pierce’s take on Britney Spears’s “Slave 4 U” — are all present and accounted for. But there are still a few notable things missing from the “Glee” big screen debut. Here are five of them.

Sue Sylvester: As previously announced, the scenes that featured Jane Lynch’s track-suited tyrant wound up on the cutting room floor, but will appear on the DVD release. As great as Lynch is, the omission doesn’t detract much; this is a concert movie, after all, and Sue wasn’t going to sing anyway.

Tina Cohen-Chang: Yes, Jenna Ushkowitz, the actress who plays the New Directions members who dresses like a “Twilight” fan, is in the movie, but she doesn’t get much in the way of screen time. Neither do Dianna Agron’s Quinn Fabray, Chord Overstreet’s Sam Evans (who isn’t returning for “Glee” Season 3) or Ashley Fink’s Lauren Zizes. The spotlight shines most frequently, as expected, on Lea Michele, Colfer, Heather Morris, Amber Riley, Darren Criss and Naya Rivera (see below).

Vocal Adrenaline: The New Directions is represented, as is the Dalton Academy’s Warblers. But the Directions’ fiercest glee club rival, the aforementioned Adrenaline, does not make an appearance.

Madonna music: Even though the pop diva’s tracks were used in “Glee’s” first full-hour tribute to an artist, none of the songs from the “Power of Madonna” episode made it on to the soundtrack.

Excessive cameos by high-profile celebrities: “Glee” has often featured (and, in some cases, been criticized for) its abundance of guest stars. But the movie is largely devoid of them, with one extremely notable exception. Yes, Gwyneth Paltrow does appear for another round of Cee Lo Green’s “Forget You.” Yes, at the end of the song, she does indeed suggest a taco run. And again, yes, you can see it all in 3D.