Which founding member of the Dixie Chicks first became a lead singer with the Court Yard Hounds?
Court Yard Hounds: Court Yard Hounds is an American country music and folk duo, founded by sisters Martie Maguire and Emily Robison. Court Yard Hounds:  Court Yard Hounds, featuring Robison for the first time as lead vocalist, released a debut album for Columbia Records, the same label for which the Dixie Chicks has recorded, on May 4, 2010. Emily Robison: Emily Burns Strayer ( Erwin, before Robison; born August 16, 1972) is an American songwriter, singer, multi-instrumentalist, and a founding member of the female country band the Dixie Chicks.
Emily Robison