She's still in her teens, but before you go perishing thoughts about Rebecca Black here are a few things you should know about Sarah Jarosz.
She plays clawhammer banjo and mandolin with prodigious intensity. She writes songs based around Edgar Allan Poe poems. And she's not afraid to throw in a countryfied Radiohead cover. Her first UK release is a polished, bluegrassy thing of no small wonder. The flame lit by Gillian Welsh is passed to the Taylor Swift generation.