One of our favorite singer / songwriters Sarah Jarosz collected her fourth Grammy this year for Best Americana Album for "World On The Ground." Playing the mandolin, guitar and banjo to accompany her pure, lilting voice, Jarosz is also a member of the progressive-folk trio I"m With Her, along with Sara Watkins and Aoife O'Donovan. Here's a track from her award- winning album, "Hometown."