More star power is being added to the upcoming Kris Kristofferson tribute concert.  Toby Keith, Martina McBride, Hank Williams Jr., Jennifer Nettles, Lee Ann Woman and Jack Ingram are all new additions.  “The Life & Songs of Kris Kristofferson” will take place on March 16th at Nashville’s Bridgestone Arena.  Previously announced performers include Lady Antebellum, Dierks Bentley, Ryan Bingham, Rosanne Cash, Eric Church, Emmylou Harris, Jamey Johnson, Willie Nelson, Darius Rucker and Trisha Yearwood.