Uncle Earl is an American old-time music group, formed in 2000 by KC Groves and Jo Serrapere. Currently the lineup consists of four women, all of whom share vocal duties: KC Groves, Kristin Andreassen, Abigail Washburn, and Rayna Gellert. They have released three albums and two EPs, and their fifth album Waterloo, Tennessee was produced by John Paul Jones of Led Zeppelin.
http://www.uncleearl.net/