The key to Sierra Ferrell’s music has been her refusal to stop challenging herself. Since breaking through in the late 2010s, the maverick West Virginia-born singer-songwriter has absorbed a laundry list of subgenres into her singular take on country music. These include bluegrass (“Silver Dollar”), traditional fiddle (“Fox Hunt”), and a variety of pop and rock reference points. At her most transcendent moments, the threads get beautifully tangled—for instance, the gorgeous, wandering melody that centers her early hit “In Dreams” recalls Eastern folk styles yet was inspired by The Kinks. Ferrell has demonstrated her versatility through collaborations with artists from Americana royalty like Zach Bryan (“Holy Roller”) and with Diplo on his country-EDM experiments (“Rain on My Mind”).