10. "New Year's Day" (2017)
What a twist: the one-time poet laureate of teen crushdom turns out to be even sharper at adult love songs. "New Year's Day" is her hushed piano-and-guitar ballad about two people waking up the morning after the party and getting back to the reality they share together. It captures the romance of mundane domestic details – sweeping up the glitter, rinsing out bottles, realizing this total nothing of a day is a memory you will cherish long after you've both forgotten the party. This is the kind of song she could keep writing into her forties and fifties.
Best line: "Please don't ever become a stranger whose laugh I could recognize anywhere."