Style marker
Minor 6th leaps
Caroline Polachek sings a lot of wide melodic leaps, including frequent fourths and fifths, but she's especially well-distinguished by how often she sings the minor 6th interval. It's uncommon in pop vocals at large, but common in her work.
It doesn't appear on Chairlift's first album, but becomes increasingly common starting with 2019's Pang.
Connection
I was really inspired by that synth riff in that song “Betty Davis Eyes.”
— Caroline Polachek, interview with genius.com, 2020
The verses in both songs alternate one-bar phrases between two voices, emphasizing the second eighth note in each measure.