If you don’t know better, when you see Billie Eilish come on stage by herself in a huge area, looking like she is wearing the clothes she slept in, bopping a bit as she walks around the perimeter of the stage that juts into the audience, you might think she is winging it. There may not be a sequin in sight, no choreography with spangled dancing girls, very few digital effects and just two back-up singers, simply dressed in polo shirts and pleated skirts. But Eilish is in control of every detail including meticulously staged lighting effects, a floating platform (reassuringly, she is tethered to it), and bursts of flame. As we will see, that also includes a powerful connection with every individual in the two gigantic arenas that are the settings for this 3D IMAX documentary concert film co-directed by Oscar-winners James Cameron and — I did say every detail — Eilish herself. She even used a camera to shoot some of the footage.

For a moment, I was annoyed at what I thought was the hands blocking the screen from the row in front of me. Then I realized they were not blocking the screen; they were on it. Cameron, the man behind the “Avatar” franchise, knows how to create a truly immersive experience. Like most concert films, this one has brief interviews with fans expressing their adoration and images audience members happily sobbing as they sing along as well as some backstage moments, in this case mostly with Cameron interviewing his co-director in an atmosphere of utter comfort and respect. One of the movie’s sweetest moments has Eilish looking through her window to see fans camped out below. She holds up a hand-lettered sign telling them she loves them and they of course go wild.

And one of the documentary’s most touching moments is when Eilish, who is in such confident command on stage, tells Cameron that while she loves performing “more than anything,” she was worried that she would not be able to because she was not comfortable in what she thought of as the expected presentation of young women singers (see the above references to sequins and choreography). Learning that she could be not just accepted but cherished for presenting herself as is (she smiles that she does her own hair and make-up, both minimal) is as important to her as the understanding and appreciation her fans find in her music. Over and over we hear them say that it is the generosity and insight in her music that makes them feel seen in a way that gives them hope and self-acceptance.

Early in the film, Eilish receives flowers and a loving note from her brother, Finneas, wishing her well on her first tour without him. That makes it all the more meaningful when he shows up late in the film to join her on stage. The relationship between them as siblings and musicians is a joy to watch, as is seeing Eilish play the audience as though it is a musical instrument. She is a truly remarkable performer. At one point, she lies down on the stage, cautioning her audience to stay as quiet as possible for just a minute so she can create a series of vocal loops requiring astonishing precision in a studio setting, near-unthinkable in live performance.

Her dedication to the fans is endearing, musing about the cuts and scrapes on her hands from trying to be in literal touch with as many as possible, and explaining that she wants to be the kind of performer her younger self would like to have been a fan of. As we are on stage with her, a part of these concerts, we can assure her that she has.

Parent should know that this film begins with a warning that it includes a lot of bright, flashing, and pulsing lights that may create problems for some viewers. Eilish’s lyrics have some strong language and sexual references.

Family discussion: Why did Billie Eilish think she would not be able to be herself on stage? What performers do you most admire and why?

If you like this, try: other concert films including performances by Taylor Swift, The Band, The Talking Heads, the Rolling Stones, and U2.