Bob Weir and Mark Karan, David Grisman, Sting and Supremes Mary Wilson are among the musicians scheduled to appear at The Narada Michael Walden Foundation’s Let the Sunshine concert on May 25. The gig will take place at San Franciscos Louise M. Davies Symphony Hall, benefiting Christopher Rodriguez, an 11-year-old innocent victim of gun violence. Other acts confirmed to appear include The Fifth Dimensions Marilyn McCoo and Billy Davis Jr., Earl Klugh and Narada Michael Walden. The concert will also support the scholarship fund of the San Francisco Conservatory of Music and benefit the work of the Narada Michael Walden Foundation.