[Afropop] The hottest band in Zimbabwe is back on the road in America. We caught the group on April 7 at a gala for Global Arts Live, an organization that has presented exceptional music and dance from around the world for over three decades. The evening began at the Somerville Theater with Angélique Kidjo, fronting a smaller, largely new band. For one thing, there was no guitar, but the newly spare sound was superb, showcasing Kidjo's incomparable voice over simmering grooves that referenced highlife and