Tuesday's MEDICINE BALL CARAVAN on KRVS (11am-noon Central Standard on 88.7FM locally) honors the passing of singer Joseph Shabalala with 2 classics from Paul Simon. Also: the latest by Clifffs, Mark Sultan and The Electric Arch. Plus: Givers, Lou Reed, Tom Tom Club, The Castaways, The Knickerbockers, Neil & Liam Finn, ELO and Gentle Giant.