This is what we found on Wikipedia regarding the Jill Andrews:

Jill Ellen Andrews (born May 23 1980) is an American singer-songwriter based in Nashville, Tennessee. She co-founded the indie folk/alt-country band The Everybodyfields, leaving in 2009 to pursue a solo career. In 2018, she co-founded the duo Hush Kids with Peter Groenwald.

Songs by Andrews have been featured in several television series, among them: "Tell That Devil", co-written with Emery Dobyns and Matthew Mayfield, was performed by Hayden Panettiere in Nashville and is the theme song for Wynonna Earp; "Lost It All", co-written with Matthew Bronleewe, was included in Teen Wolf and The Originals; and "Rust or Gold", co-written with Elise Hayes, in Grey's Anatomy and Beauty & the Beast. "Rust or Gold" was released as a single concurrent with its debut on Grey's Anatomy and within two days ranked in the top ten of iTunes' Singer/Songwriter chart.