Rhiannon Giddens "Spanish Mary" on Austin City Limits

We saw this singer on the Boston Pops Fourth of July program last night. Besides Rita Moreno we though Rhiannon Giddens was the hit of the program. She sings, plays guitar, banjo, fiddle, and flat dances (look it up if you don't what that is). Her music is a blend of Genres:
Folk, Old-Time music, Bluegrass, Country, Gospel, Blues, Jazz, soul, R&B, Celtic, Americana, Her original group was the Carolina Chocolate Drops.