Darius Rucker and Randy Houser both have successful music careers, and now they are being recognized for their volunteer work with Musicians On Call, a non-profit organization that brings live and recorded music to the bedside of patients in healthcare facilities.  NBC’s Lester Holt traveled to Nashville to join them as they performed with patients at Monroe Carell Jr. Children’s Hospital at Vanderbilt Hospital.  The visit will be the focus of the “Making a Difference” segment of NBC Nightly News tonight, Feb. 16 at 6:30 p.m. ET / 5:30 CT plus a “Web Extra” on the Nightly News tab of NBCNews.com featuring an extended interview with Rucker.  The two artists shared with Holt their experiences over the years performing for patients in healthcare facilities and the influence it has on them personally to witness the visible affect music has on these patients. Musicians On Call Executive Director, Dr. Leslie Faerstein told NBC:  “Musicians On Call goes to the bedsides of patients 41 times a week in six cities and delivers the healing power of music to those who need it most.”