Really,  JS  ? 
I only got involved in Feb of 2008 so maybe last year is clearer for me . . but thought I remembered GPN opened for Dave Matthews on her 25th birthday (sort of a neat present yes ?) so searched KC's archives.
http://www.thisissomewhere.com/2008/06/19/with-dave-matthews-at-the-saratoga-performing-arts-center/

and Grace's bio  http://gracepotter.com/grace.html 
Born:  June 20th, 1983