Driving or riding in a car can be monotonous, and one of the most common ways to kill the boredom is to put on some music. And once the music starts, the urge to sing along is almost irresistible.

Caraoke occurs when characters engage in an impromptu sing-along while inside a vehicle. Unlike a formal Diegetic Musical number (where reality bends for a full song-and-dance routine) this is a casual In-Universe moment in which characters sing for their own amusement—to annoy fellow passengers, embarrass their kids, mess with drivers in the next lane, or simply stay awake during a long road trip.

It is considered one of the most effective humanizing tools in a writer's kit. Because the car is a confined, private space that moves through a public world, it creates a unique bubble where characters feel safe enough to be vulnerable and goofy.

The trope typically follows a specific trajectory:

• A song begins playing via the radio, a cassette, or an aux cord. Usually, the song is a Nostalgia Filter favorite that everyone (including the audience) knows the words to. Sometimes, it can just as easily start in silence where a character sings A cappella.
• One character (often the Cloudcuckoolander or the Big Fun) starts humming or "testing the waters" with a few lyrics.
• The other passengers join one by one. However, not everyone may be into it; one character (usually The Stoic or The Quiet One of the group) might be visibly annoyed, especially if the singing is aggressively off-key. If that character eventually cracks a smile and joins in, it often signals a major thaw in their personality.
• In comedic or tragic instances, the singing is cut short and a Mood Whiplash follows. The driver might become so distracted that they nearly crash or an external event (such as a siren or sudden phone call) abruptly brings everyone back to reality.

Common variations include a group of friends bonding or strengthening their relationship through a car sing-along, or a solo performance in which a character belts out a song to vent frustration, celebrate a victory, or cry over a breakup. These moments are often interrupted by a pedestrian, a passenger, or another driver. Another variation involves two characters who initially dislike each other discovering a shared guilty pleasure song, which helps develop their relationship. They may also be singing to a "Setting Off" Song if they are heading off on an adventure. If they get too caught up in the performance, they might forget that their windows are down, they are driving a convertible, or their car lacks tinted windows—leaving them open to being Caught Singing and possibly Mistaken for Drunk by bewildered onlookers.

The trope is most frequently Played for Laughs with off-key singing, but there are cases where it becomes a The Cast Show Off moment when an actor in the scene possesses genuine musical talent. In some works, such scenes become a Signature Scene, and the song featured gains renewed popularity.

Can lead to Car Radio Dispute if the characters argue over which song or station to sing along to. Compare AM/FM Characterization, where a character's personality is revealed through their taste in music, and Car Ride Games, where the passengers play games instead of singing to pass the time. Not to be confused with Driving Song and Car Song, which are songs about, well, driving and cars.

Take note: music videos where the singer is simply lip-syncing to a song while in a vehicle are generally excluded, as singing is the primary purpose of the medium rather than part of a narrative scene. An exception may be made if that portion of the video specifically parodies this trope. Formal musical numbers are also not counted unless they function as a natural sing-along, such as the "Party in the U.S.A." scene in Pitch Perfect.

No Real Life Examples, Please! Because singing in the car is a near-universal human experience, listing real-world instances would be exhaustive and redundant.

Examples: