From Wikipedia:

“Eva Marie Cassidy (February 2, 1963 – November 2, 1996) was an American vocalist and guitarist known for her interpretations of jazz, blues, folk, gospel, country, rock and pop classics.”

From her posthumously released CD Somewhere (2008):

“From Dolly Parton’s ‘Coat of Many Colors’ to her own ‘Somewhere,’ Eva covers a wide musical spectrum-country, folk, blues, R&B, western swing, appalachian, celtic, Willie Nelson, Gershwin.”

BONUS: “If I Give My Heart.”