Olivia Rodrigo knows exactly what works in her new single, ‘Deja Vu’

“Deja Vu� is right.

In Olivia Rodrigo’s killer new single, “Deja Vu� — it’s the much anticipated follow-up to her smash debut, “Drivers License,� which spent eight weeks at No. 1 — the 18-year-old pop singer skewers an ex for using his old moves on a new girlfriend.

“So when you gonna tell her that we did that too?� she asks the guy as layered synth lines twinkle around her, “She thinks it’s special, but it’s all reused.�

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The same could be said of the clever songwriting and production tricks Rodrigo repeats in “Deja Vu� — the way she makes a musical phrase of someone’s laughter (as she did with the chime of a car alarm in “Drivers License�), for instance, or her deployment of an unexpected swear word in the song’s bridge (à la the crucial F-bomb she dropped last time).

You can’t blame her for doubling down. A perfect specimen of teen melodrama, “Drivers License� was an honest-to-goodness phenomenon that set records at Billboard and Spotify and inspired a widely seen sketch on “Saturday Night Live.� Nearly three months after it came out, the power ballad — which hasn’t dropped below No. 5 on the Hot 100 — is still racking up more than 1 million streams a day.

But also: These are great tricks! Rodrigo would be foolish not to use them again — hardly a mistake you’re likely to see from an actor who got her start on a Disney show called “High School Musical: The Musical: The Series.�

And anyway, “Deja Vu� — the second single, Rodrigo announced Thursday morning, from her debut album due May 21 — has plenty of its own beautifully rendered detail.

Co-written and produced by Dan Nigro, who also did “Drivers License,� the new single paints a vivid scene right from the get-go: “Car ride to Malibu / Strawberry ice cream, one spoon for two,� Rodrigo sings wistfully, “And trading jackets / Laughing ’bout how small it looks on you.�

She goes on to rhyme “Watching reruns of ‘Glee’� with “Being annoying, singing in harmony� — real theater-kid dream-weaving here — before making clear that these treasured memories are just part of a well-established pattern for her ex.

Later, after a surprisingly rowdy beat has kicked in, Rodrigo reveals the true outrage:

I bet that she knows Billy Joel
’Cause you played her “Uptown Girl�
You’re singing it together
I bet you even tell her
How you love her
In between the chorus and the verse

The audacity.