(ANNANDALE-on-HUDSON, N.Y.) — Hudson Valley-born, two-time Grammy Award-nominated singer-songwriter Martha Wainwright returns to the Bard SummerScape festival’s Spiegeltent on Friday, July 11, 2014, at 8:30pm with a program of pared-down folk-rock showcasing a voice that blends honey and grit. The daughter of Loudon Wainwright III and Kate McGarrigle, and sister of Rufus Wainwright, she “roughs up life’s smooth spots, then digs her fingertips into the cracks that form” (NPR).