The star power for the previously announced Hearts Unsung benefit concert in Nashville has just increased by . . . well . . . a LOT!In addition to the previously announced Lady Antebellum, we have just learned that Martina McBride, Hunter Hayes, Jewel, Maddie & Tae and Trace Adkins will be part of this stellar line-up benefiting Children’s Miracle Network Hospitals.Nash Presents: Hearts Unsungtakes place November 9 at Nashville’s opulent Schermerhorn Symphony Center.The concert event will serve as the centerpiece for a full-length feature film directed and produced by Nash TV Films, which is set to be presented in selected theaters throughout the U.S. Jan. 21, 2016.In addition, the concert will spotlight a two-night Nash Nights Live special airing Nov. 6 and during the actual event. The broadcast will include updates from the show, behind-the songs stories from the artists and testimonials about Children’s Miracle Network Hospitals.